insure意思為確保；保證；投保；為…保險(xiǎn)，買賣或賣保險(xiǎn)，在美語(yǔ)中ensure常常拼寫為insure。

　　assure例句：

　　You think I did it deliberately, but I assure you (that) I did not.

　　你認(rèn)為這是我故意干的，不過(guò)我向你保證不是的。

　　We were assured that everything possible was being done.

　　我們確信是在盡一切努力。

　　ensure例句：

　　The book ensured his success.

　　這本書(shū)保證了他的成功。

　　Please ensure (that) all lights are switched off.

　　請(qǐng)務(wù)必將所有燈都關(guān)掉。

　　insure例句：

　　The painting is insured for $1 million.

　　這幅油畫投了100萬(wàn)元的保險(xiǎn)。

　　Luckily he had insured himself against long-term illness.

　　幸運(yùn)的是，他為自己投保了長(zhǎng)期病險(xiǎn)。