assure 表示向某人保证某事一定会发生(内含有让某人放心之意,以消除疑虑) assure sb. of sth /assure sb. that...
He assured us of his ability to solve the problem.
他向我们保证他有能力解决这个问题。
The witness assured the judge that he was telling the truth .
ensure "确定,保证" 确保某种行为一定会发生 ensure sth. /ensure that..
I will ensure that the car arrives by six o'clock.
我保证汽车六点钟以前到。
This medicine will ensure you a good night's sleep.
这药能保证你睡一夜好觉。
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