With any container that you choose, you need to ensure that it allows the water in it to drain when necessary.
对于您选择的任何容器，您需要确保在需要的时候它能够排除里面的水。
A new system allows a combine harvester, say, to send a call over to a tractor-trailer so the driver can unload the grain as and when necessary.
例如，一种新的系统允许联合收割机向牵引拖车发送呼叫，以便司机可以在必要的时候卸载谷物。
The government, when necessary, has recourse to the armed forces.
政府在必要时可以动用军队。
Sometimes I watched the online classes again when necessary.
有时候，我会在必要时再看一遍在线课程。
Although they are big animals, elephants can move silently when necessary.
虽然大象是大型动物，但在必要时它们可以悄悄地移动。
Only flush the toilet when necessary: this means to not use the toilet as a garbage to avoid wasting water.
只在必要时冲厕所：这意味着不要把厕所当作垃圾桶使用以避免浪费水。
We create an opportunity for assessment and intervention, to help clients and communities cope effectively with their reality and change that reality when necessary.
我们为评估和干预创造机会，帮助客户和各大团体有效地应对现实问题，并在必要时对现实做出改变。
They generally tend to share very similar tastes in music and clothes, they spend their money in having a good time, and save for holidays or longer-term plans when necessary.
他们通常倾向于在音乐和服装上有着非常相似的品味，他们把钱花在享乐上，并在必要时为假期或长期计划存钱。
Confess your SINS and ask for forgiveness when necessary.
承认你的过犯，必要的时候请求饶恕。
Perl 6 regular expressions can be reused when necessary.
在需要时，Perl6正则表达式可以被复用。
HAC detects failures, performs failovers, and restarts servers when necessary.
HAC检测故障，执行故障转移，必要时重新启动服务器。
DTP will have a dynamic online format, allowing regular updates when necessary.
同时DTP将采取动态的形式，并根据需要定期升级。
The finger will determine your speed making it easy to speed up or slow down when necessary.
手指会决定你的阅读速度，让你可以根据需要加快或减慢你的阅读速度。
They then retransmit packets from the source segment to the destination segment when necessary.
之后在必要时，网桥将源网段的数据包重发送到终网段。
Delegate tasks to other staff members, when necessary, or outsource them to an external vendor.
有需要的话委托别的同事帮忙完成手头上的任务，或支付一定的酬金出售给外部的人员做。
As a referee, you must also be confident and alert enough to overrule your assistant when necessary.
作为一名主裁，你必须自信，并且在必要时否决助理裁判的判罚。
They are facilitators, defusing conflict and steering the conversation back on topic when necessary.
他们是调解者，在必要的时候化解冲突并掌控整个谈话回到正题上来。
Only turn the water heater on when necessary, and adjust temperature controls to avoid overheating.
热水器不用就别开，温度控制不要过热。
If the key is encrypted, you can save the password somewhere on the disk, and read it in when necessary.
如果加密了密钥，您可以在磁盘的某处保存密码，然后在需要的时候读取它。
For development, strive for simplicity, integrate your build at least daily, and refactor when necessary.
为了开发，努力进行简化并保证至少每天都集成您所构建的程序，必要时进行重构。
Indicate that you will make yourself available to come in to the office when necessary, for meetings, etc.
并标明如果公司需要的话你会来办公室，比如出席会议等。
We shave, shower and brush our teeth. When necessary, a man can be up and ready in seven minutes or better.
在必要的时候，一个男人可以在七分钟甚至更短的时间起床并准备好一切。
And you need to respond when necessary, especially when you need toclarify or correct what someone has said.
同时，在必要的时候，尤其是当你需要对别人所说的话进行更正和澄清的时候，你需要做出一定的回应。
This allows a single JSP class to be reloaded when necessary, without affecting any other loaded JSP classes.
这使得在必要时可重新加载单独的jsp类，而不会影响到任何其它加载的jsp类。
This allows a single JSP class to be reloaded when necessary, without affecting any other loaded JSP classes.
这使得在必要时可重新加载单独的jsp类，而不会影响到任何其它加载的jsp类。
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