Always make a backup disk as an insurance policy.

　　為保險(xiǎn)起見(jiàn)，每次都要做備份磁盤(pán)。

　　She gave false information to the insurance company.

　　她向保險(xiǎn)公司提供了不真實(shí)的'資料。

　　Assessing insurance risk can never be an exact science.

　　估定承保的風(fēng)險(xiǎn)永遠(yuǎn)不會(huì)成為一門(mén)精確的科學(xué)。

　　They trade on people's insecurity to sell them insurance.

　　他們利用人們的不安全感向他們推銷保險(xiǎn)。

　　At that time people had large families as an insurance against some children dying.

　　那時(shí)人們養(yǎng)的子女很多，以防有孩子夭折。