Lesson 23 Bird flight
第23課 鳥的飛行方法
First listen and then answer the following question.
聽錄音，然后回答以下問題。
What are the two main types of bird flight described by the author?
在作者的描述中鳥的兩種飛行方法是什么？
No two sorts of birds practise quite the same sort of flight;
沒有任何兩種鳥的飛行方式是相同的。
the varieties are infinite; but two classes may be roughly seen.
鳥的飛行方式千差萬別，但大體上可分為兩類。
Any ship that crosses the Pacific
任何一艘橫度太平洋的輪船都會(huì)
is accompanied for many days by the smaller albatross,
有一種小信天翁伴隨飛行許多天。
which may keep company with the vessel for an hour
它們隨船飛行一小時(shí)也
without visible or more than occasional movement of wing.
難得見其扇動(dòng)一下翅膀。
The currents of air that the walls of the ship direct upwards,
沿船體的上升的氣流
as well as in the line of its course,
和沿航線向前的氣流
are enough to give the great bird with its immense wings
給這種巨翼大鳥
sufficient sustenance and progress.
以足夠的浮力和推力。
The albatross is the king of the gliders,
信天翁是滑翔飛行的鳥類，
the class of fliers which harness the air to their purpose,
它能自如地駕馭空氣，
but must yield to its opposition.
但必須順氣流飛行。
In the contrary school, the duck is supreme.
與滑翔鳥相對(duì)的另一類鳥中，數(shù)野鴨本領(lǐng)高。
It comes nearer to the engines with which man has 'conquered' the air, as he boasts.
它更近乎于人類自夸的“征服”了空氣的發(fā)動(dòng)機(jī)。
Duck, and like them the pigeons, are endowed with steel-like muscles,
野鴨及它們相似的鴿子有天賦的鋼鐵般的肌肉，
that are a good part of the weight of the bird,
占了體重的很大一部分。
and these will ply the short wings with such irresistible power
這些肌肉以巨大的力量扇動(dòng)短小的翅膀，
that they can bore for long distances through an opposing gale
使這類鳥能頂著大風(fēng)
before exhaustion follows.
飛行很遠(yuǎn)的路才會(huì)疲勞。
Their humbler followers, such as partridges,
次于野鴨和鴿子的鳥，如鷓鴣，
have a like power of strong propulsion, but soon tire.
有相似的巨大推動(dòng)力，但很快會(huì)疲勞。
You may pick them up in utter exhaustion,
如果海風(fēng)驅(qū)使它們飛行很長距離，
if wind over the sea has driven them to a long journey.
你可以撿到一些因筋疲力盡而摔下來的鷓鴣。
The swallow shares the virtues of both schools in highest measure.
燕子充分兼有這兩類鳥的長處，
It tires not, nor does it boast of its power; but belongs to the air
它既不疲勞，也不炫耀自己的飛翔力；在空中十分自如，
travelling it may be six thousand miles to and from its northern nesting home,
可以飛行6，000英里，可以飛往北方做窩的老家，再從老家飛回；
feeding its flown young as it flies, and slipping through a medium
一邊飛一邊喂養(yǎng)會(huì)飛的雛燕，
that seems to help its passage even when the wind is adverse.
甚至在頂風(fēng)時(shí)也能在氣流中滑翔，似乎氣流在幫它前進(jìn)。
Such birds do us good,
這些鳥對(duì)我們是有益的，
though we no longer take omens from their flight on this side and that;
雖然我們不再從它們的飛翔姿態(tài)來占卜吉兇，
and even the most superstitious villagers no longer take off their hats to the magpie and wish it good-morning.
連迷信的村民也不再對(duì)喜鵲脫帽行禮，祝它早安了。
第23課 鳥的飛行方法
First listen and then answer the following question.
聽錄音，然后回答以下問題。
What are the two main types of bird flight described by the author?
在作者的描述中鳥的兩種飛行方法是什么？
No two sorts of birds practise quite the same sort of flight;
沒有任何兩種鳥的飛行方式是相同的。
the varieties are infinite; but two classes may be roughly seen.
鳥的飛行方式千差萬別，但大體上可分為兩類。
Any ship that crosses the Pacific
任何一艘橫度太平洋的輪船都會(huì)
is accompanied for many days by the smaller albatross,
有一種小信天翁伴隨飛行許多天。
which may keep company with the vessel for an hour
它們隨船飛行一小時(shí)也
without visible or more than occasional movement of wing.
難得見其扇動(dòng)一下翅膀。
The currents of air that the walls of the ship direct upwards,
沿船體的上升的氣流
as well as in the line of its course,
和沿航線向前的氣流
are enough to give the great bird with its immense wings
給這種巨翼大鳥
sufficient sustenance and progress.
以足夠的浮力和推力。
The albatross is the king of the gliders,
信天翁是滑翔飛行的鳥類，
the class of fliers which harness the air to their purpose,
它能自如地駕馭空氣，
but must yield to its opposition.
但必須順氣流飛行。
In the contrary school, the duck is supreme.
與滑翔鳥相對(duì)的另一類鳥中，數(shù)野鴨本領(lǐng)高。
It comes nearer to the engines with which man has 'conquered' the air, as he boasts.
它更近乎于人類自夸的“征服”了空氣的發(fā)動(dòng)機(jī)。
Duck, and like them the pigeons, are endowed with steel-like muscles,
野鴨及它們相似的鴿子有天賦的鋼鐵般的肌肉，
that are a good part of the weight of the bird,
占了體重的很大一部分。
and these will ply the short wings with such irresistible power
這些肌肉以巨大的力量扇動(dòng)短小的翅膀，
that they can bore for long distances through an opposing gale
使這類鳥能頂著大風(fēng)
before exhaustion follows.
飛行很遠(yuǎn)的路才會(huì)疲勞。
Their humbler followers, such as partridges,
次于野鴨和鴿子的鳥，如鷓鴣，
have a like power of strong propulsion, but soon tire.
有相似的巨大推動(dòng)力，但很快會(huì)疲勞。
You may pick them up in utter exhaustion,
如果海風(fēng)驅(qū)使它們飛行很長距離，
if wind over the sea has driven them to a long journey.
你可以撿到一些因筋疲力盡而摔下來的鷓鴣。
The swallow shares the virtues of both schools in highest measure.
燕子充分兼有這兩類鳥的長處，
It tires not, nor does it boast of its power; but belongs to the air
它既不疲勞，也不炫耀自己的飛翔力；在空中十分自如，
travelling it may be six thousand miles to and from its northern nesting home,
可以飛行6，000英里，可以飛往北方做窩的老家，再從老家飛回；
feeding its flown young as it flies, and slipping through a medium
一邊飛一邊喂養(yǎng)會(huì)飛的雛燕，
that seems to help its passage even when the wind is adverse.
甚至在頂風(fēng)時(shí)也能在氣流中滑翔，似乎氣流在幫它前進(jìn)。
Such birds do us good,
這些鳥對(duì)我們是有益的，
though we no longer take omens from their flight on this side and that;
雖然我們不再從它們的飛翔姿態(tài)來占卜吉兇，
and even the most superstitious villagers no longer take off their hats to the magpie and wish it good-morning.
連迷信的村民也不再對(duì)喜鵲脫帽行禮，祝它早安了。