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I assured him of our affection．我向他肯定地说我们是爱他的。
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ensure表示“保证（有）”、“使一定得到”：
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I can’t ensure that he will be there in time．我不能保证他能准时到达。
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Come early to ensure getting a good seat．早些来以确保有好座位。
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This medicine will ensure you a good night’s sleep．这种药可以确保你睡一夜好觉。
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His reputation was enough to ensure that he was always welcome．他的名望足以保证他随时会受到欢迎。
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One more touchdown will ensure (insure) victory．再进一球可确保获胜。
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insure表示“给……保险”：
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She insured her car against theft．她给车买了防盗险。
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He insured the house for $40,000．他给房子买了40000美元的保险。
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Are you insuring against fire？你保火险了吗？
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Insure your baggage before you leave home．离家前给行李买保险。
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在美式英语中，insure也可表示“确保”：
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I shall try to insure that your stay is a pleasant one．我将设法确保你待得很愉快。
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108 at
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at是一个非常活跃的词，可表示：
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在（某处或某场合）：
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He was not at his office．他不在他办公室里。
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I live at 403, Brook Street．我住在布鲁克街第403号。
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They had left their luggage at the station．他们把行李留在车站了。
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I shan’t be at home for lunch．我不在家吃午饭。
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The car is waiting at the gate．车在门口等着。
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Did you speak at the meeting？你在会上发言了吗？
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Let’s meet at the club．咱们在俱乐部碰头。
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在（某个时刻，某时期）：
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