大家都搜：
当需要时
1、when is it───什么时候
2、when it is───当它是
3、when it comes───当它来的时候
4、when it───当它
5、when was it───什么时候
6、when it is on───当它打开时
7、when old is it───它什么时候老了
8、when is───什么时候
9、needed───v.需要（need的过去式）；adj.需要的
1、Delivery of data, exactly when it is needed, as a standards-based data service.───数据的时候能精确地交付数据，要作为一项基于标准的服务。
2、this feature ensures that Hibernate loads the data only when it is needed.───这个特性确保Hibernate只在需要时装载数据。
3、Scientists are developing new ways to capture solar energy and to put it to use where-and-when-it is needed.───科学家们正在发展新的途径来捕捉太阳能以及如何把它应用到及时需要它的地方去。
4、When it is needed, we'll provide a placeholder string.───当需要它时，我们将给出一个占位符字符串。
5、Friends for life, does not need commitment, only when it is needed most to appear sadly, bring a surprise, a little care, a comfort.───一生的朋友，不需要承诺，只在最需要的时候悄然出现，带来一丝惊喜，一点关怀，一份安慰。
6、Providing a windmill capable of providing all the irrigation water needed, when it is needed, is neither practical nor economically sound.───当灌溉期来临时，急需用水，让风车在短期内提供大量的水，既不实际，也不经济。
7、These statistics are easy to gather, but without an unintrusive means of retrieving the data when it is needed, they are not very useful.───这些统计值容易搜集，但是在需要数据的时候，如果没有非侵入性的数据检索机制，那么这些值就不太有用。
8、But others contend that such restrictions could dull America's edge in innovation, just when it is needed to help revive the economy.───但是另一些人认为这些限制仅仅是来帮助恢复经济，却会减弱美国的革新优势。
9、Information in long-term memory can be recalled at a later time when it is needed. The information may be kept for days or weeks.───处于长期记忆中的信息，在后来需要的时候能够回想起来，这一信息保持数天或数周。
1、These statistics are easy to gather, but without an unintrusive means of retrieving the data when it is needed, they are not very useful.
2、He wants to control what information the public gets in the hopes of molding public opinion if and when it is needed.
3、Information in long-term memory can be recalled at a later time when it is needed.