必要时

Circulating water or jet stream can take off a majority of heat caused by friction ,if necessary.

必要时，可用循环水或喷气气流把摩擦产生的大部分热量带走。

Most of the heat produced by friction can be taken away by circulating water or jet stream when it is necessary.

必要时，可用循环水或喷气气流把摩擦产生的大部分热量带走。

In this case special measures are taken to keep a count of the cumulative DC offset, and to modify the codes if necessary to make the DC offset always tend back to zero.

在这种情况下，必须作特殊的测量来计算直流输出的累积误差，并且在必要时改变电压大小来让误差永远趋向零。

Never doubt, however, that Lancaster was ready to handle shit when it was necessary.

然而，不可怀疑的是当在必要时兰卡斯特随时准备处理"垃圾"。

Objective To discuss the roles of mechanical ventilation associated with bronchoalveolar lavage when necessary in patients with severe respiratory failure.

目的探讨机械通气必要时联合支气管肺泡灌洗在ICU治疗呼吸衰竭的作用。

If necessary, they should have the levy of technical training.

必要时可给予相应有征对性的技术培训。

G The contractor shall arrange for the presence of the vendor's and the licenser's representatives at the site to assist the contractor's personnel, wherever necessary.

g 承包商必要时应安排供货商和技术许可商的代表到现场协助承包商的人员。

This usage has survived, for example, in our term lieutenant governor, the deputy of the governor and the one who replaces the governor if need be.

这种用法至今仍使用，例如，我们的短语lieutenant governor 州长的副职和必要时代替州长的人。

Article 35 In the case of breach of contract by the borrower, the loaner shall timely take effective measures, and hold it liable for breach of contract according to law if necessary.

第三十五条借款人出现违反合同约定情形的，贷款人应及时采取有效措施，必要时应依法追究借款人的违约责任。

If necessary, local governments may provide a maximum limit.

必要时，地方人民政府可规定最高限制。

In the negative and interrogative forms, of course, this is identical to the non-emphatic forms.

。但是，在否定句或疑问句里，这种带有"do"的方法表达的效果却没有什么强调的意思。

Go down on one's knees;kneel down

屈膝跪下。。。下跪祈祷