需要时

You are my ace in the hole; I'll call on you when I need you.

你是我共患难的朋友，需要时我会来找你。

Active To-Do List is very simple to learn and use, but also offers advanced filtering and searching capabilities when needed.

积极向待办事项清单是很简单的学习和使用，而且还提供先进的过滤和搜索能力，有需要时。

Because it can be a rotated line or the user can rotate the line whenever required, the coordinates can go into the negative when rotated.

因为它可以是一个旋转线或用户可以旋转线需要时，可以进入的坐标去的负面旋转时。

The guards of the city were at that time under the charge of Gaius Maecenas, of equestrian rank, but none the less of illustrious lineage, a man who was literally sleepless when occasion demanded, and quick to foresee what was to be done and skilful in doing it, but when any relaxation was allowed him from business cares would almost outdo a woman in giving himself up to indolence and soft luxury.

当时罗马的守备部队由出身骑士等级的盖乌斯·玛塞纳斯掌控。他的血统却很高贵，他在形势需要时可以非常警惕，迅速地预见出下一步该采取的行动并熟练地执行之；但当可以脱开公务消遣之时，其沉迷奢华温柔怠惰懒散几乎又超过了妇人。

When you can't think of the right word (which you might know receptively but fail to produce when you want it), you have to find alternative words to express your meaning.

你找不到恰当的词汇的时候(见到或听到时可能能理解，但需要时却用不上)，你不得不用别的词来表达你的意思。

Your IP Address is recorded with each post you make on this discussion system and is retrievable by the forum staff if need-be.

你登陆论坛时的IP将被系统自动记录，在有需要时将由论坛管理人员进行举证。

I have seen in his face a far different expression from that which hardens it now while she is so vivaciously accosting him, but then it came of itself: it was not elicited by meretricious arts and calculated manoeuvres; and one had but to accept it — to answer what he asked without pretension, to address him when needful without grimace — and it increased and grew kinder and more genial, and warmed one like a fostering sunbeam.

但那时这种表情是自然产生的，不是靠低俗的计谋和利己的手腕来索讨的。你只要接受它就是——他发问时你回答，不用弄虚作假；需要时同他说话，不必挤眉弄眼——而这种表情会越来越浓，越来越温和，越来越亲切，象滋养人的阳光那样使你感到温暖。

DICE 3 pieces, which are used when it is needed to determine how the pais are to be drawn before starting of a break and at beginning of each game.

骰子3只，是在需要时透过掷骰以确定在每一分段或每一局的开始时各人取牌的安排。

He appears when we need and vanishes when we are celebrating.

他在我们需要时出现，在我们庆祝时消失。

When developing or selecting a utility tool, it should be written in hackable/readable programming language to enable users to modify if they want.

当开发或选择一个实用工具时，它应该用可hack/可读的程序语言来写，以允许用户在他们需要时可以修改它。

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