一朝被蛇咬，十年怕草繩Once bitten, twice shy.
一言既出，駟馬難追A word spoken is past recalling.
一見(jiàn)鐘情to fall in love at first sight
一箭雙雕/一舉兩得Kill two birds with one stone.
一寸光陰一寸金Time is money.
一失足成千古恨The error committed on impulse may turn out to be the sorrow of a whole life.
一將功名萬(wàn)古枯What millions died that Caesar might be great.
一年之計(jì)在于春，一日之計(jì)在于晨Plan your year in spring and your day at dawn.
一人難稱百人意You cannot please everyone.
一氣呵成Never make two bites of a cherry.
九死一生to have a hair-breadth escape
九牛一毛a drop in the bucket
人生如夢(mèng)Life is but a dream.
人生自古誰(shuí)無(wú)死Death comes to all men.
人不可貌相Appearances are often deceptive./ Never judge a book by its cover.
人山人海a sea of faces：How many people are there in the stadium? Believe it or not, a sea of faces.
人云亦云echo others' words
人面獸心a wolf in sheep's clothing
人言可畏Opinion rules the world
十年風(fēng)水輪流轉(zhuǎn)Every dog has its day.
十全十美leave nothing to be desired
十拿九穩(wěn)win something in the bag.
一言既出，駟馬難追A word spoken is past recalling.
一見(jiàn)鐘情to fall in love at first sight
一箭雙雕/一舉兩得Kill two birds with one stone.
一寸光陰一寸金Time is money.
一失足成千古恨The error committed on impulse may turn out to be the sorrow of a whole life.
一將功名萬(wàn)古枯What millions died that Caesar might be great.
一年之計(jì)在于春，一日之計(jì)在于晨Plan your year in spring and your day at dawn.
一人難稱百人意You cannot please everyone.
一氣呵成Never make two bites of a cherry.
九死一生to have a hair-breadth escape
九牛一毛a drop in the bucket
人生如夢(mèng)Life is but a dream.
人生自古誰(shuí)無(wú)死Death comes to all men.
人不可貌相Appearances are often deceptive./ Never judge a book by its cover.
人山人海a sea of faces：How many people are there in the stadium? Believe it or not, a sea of faces.
人云亦云echo others' words
人面獸心a wolf in sheep's clothing
人言可畏Opinion rules the world
十年風(fēng)水輪流轉(zhuǎn)Every dog has its day.
十全十美leave nothing to be desired
十拿九穩(wěn)win something in the bag.