又称万全河。

River, also known as foolproof.

为了万全起见我离开前清理了我的桌子。

I took the precaution of clearing out my desk before I left.

爬山之前最好有万全的准备，以免发生山难。

Before climbing it is BEST to be properly prepared, in case of any mishap.

我为这次面试做好了万全的心理准备，可最后它临时取消了。

I'd got myself all psyched up for the interview and then it was called off at the last minute.

一旦出现问题，高管们就有可能要面临牢狱之灾，在资产负债表上保留一点现金，也是为了以策万全。

Executives face possible prison sentences if things go wrong; keeping a bit of cash on the balance sheet is a kind of insurance policy.