失效的英文：
fail
lose effectiveness

参考例句：

It will be sterilised when it is beyond the limit to its storage life.
超出保存期则失效。

No such Variation shall vitiate this Contract.
任何该等变更都不会造成本合同失效。

It is worth remembering that previous wills are nullified automatically upon marriage.
要记住的是，一旦结婚，原遗嘱自动失效。

This, of course, would nullify the effect of the move and merely accelerate inflation.
这毫无疑问会使该举措完全失效，而仅仅只是加速通货膨胀。

A contract signed now might be invalidated at some future date.
现在签订的合同可能在将来的某一天就会失效。

any obsolete documents retained for legal and/or knowledge preservation purposes are suitably identified.
为法律以及(或)保存知识的目的而保留的任何失效文件有适当的标明。

To make ineffective;invalidate.
使无效;使失效

This law has lapsed.
这个法律失效了。

The engine had blown a gasket.
发动机的一个垫圈失效了。

Disable Viewport Toggle
视图切换失效

fail是什么意思：
n. 不及格
v. 失败，不及格；破产；缺乏；衰退

If you fail to plan, you plan to fail.
如果你不做计划，那就是在计划着失败。

The download failed.
下载失败。

Intelligent as you are, I suspect you will fail.
尽管你聪明，我还是猜想你会失败。

lose是什么意思：
v. 遗失；输掉；浪费；被...夺去；不明白；逃避；错过

to lose; to miss; to disappear; to mislay
遗失

A tale never loses in the telling.
故事总是被人们说得添枝加叶的。

Merry is he that has nought to lose
人无所失,不亦乐乎

effectiveness是什么意思：
n. 有效，效力

This parameter has no effect.
此参数不起作用。

The drug was of no effect.
这药无效。

The helpful effect on propellant slosh effects was a secondary consideration
推进剂晃动的有利性影响是一个次要的考虑因素。