87问：什么时候用ensure? 什么时候用insure?

Question 87: When is it best to use ensure versus insure?

Answer:    Although ensure and insure are interchangeable synonyms, insure has a distinct usage for an action taken as a precaution and prior to an action, such as the act of taking out an insurance policy.

Examples: "I will ensure his safe arrival."
"He should insure his car."

问题87问：什么时候用ensure? 什么时候用insure?

回答：虽然两者发音相同，仅一个字母之差，而且有时可以互相取代。但是insure有一个不同的用法，就是表示在发生一件事情之前采取的预警行为或预防措施，比如去保险。

例如：
"I will ensure his safe arrival."
"He should insure his car."