The teacher told us to look at the blackboard.
老師叫我們看黑板。
重點詞語：look n.看，注視 vt.注視
商務用語：look into 觀察，調查
look to 期望
a new look 新貌
I cannot find my watch; I must have lost it.
我找不到手表了，我一定把它給丟了。
重點詞語：lose vt.虧損，浪費，遺失 vi.受損失，失敗
商務用語：lose control of 失控
lose by 因……而遭受損失