必要时

It is essential that all responders understand that in the real world that time loss costs lives and property.

每个反应单位对于真实世界中时间耗损将造成生命与财产的损失的理解时非常有必要的。

Looms that use rigid rapiers entirely the need to assist the rapier head through the warp shed .

织机在使用刚性剑杆时完全没有必要引导剑杆头穿越梭口。

Looms that use rigid rapiers eliminate entirely the need to assist the rapier head through the warp shed.

织机在使用刚性剑杆时完全没有必要引导剑杆头穿越梭口。

At the beginning of Augustus' reign there were 16 praetors, which he reduced to 12, a number that generally prevailed thereafter (though it could be expanded if necessary).

奥古斯都的统治开始之时，大法官的人数有十六人，他将其减少至十二人，此后这一官职的人数一直保持此值，当然如有必要则可以增加此数。

By making point settings and switch assignments traction control can be applied whenever necessary.

通过做点设置和开关任务牵引控制可以是应用的，每当必要。只有当节流孔从中性被移动向餵方向时，这个作用经营

The differentiation in skulls of Tibetan pikas in the three mountains was assumed to correlate with geographical barriers created by the uplift of the Qingzang Plateau.

本研究揭示了在进行藏鼠兔等小型兽类种及种下阶元划分时，除数理统计手段引入的必要外，尚应充分考虑不同地理区域种群可能已产生的局部分化。

As the global economy is slowing down, it is necessary to respond appropriately. The reduced charges, in particular, should prove effective. However, a price-cutting war should be avoided at all costs.

在全球经济放缓的时刻，采取与时并进的政策是有必要的，特别是在调整收费方面，相信可以收到一定的效果，但切忌掀起&削价战&。

As the global economy is slowing down, it is necessary to respond appropriately. The reduced charges, in particular, have to prove effective. However, a price-cutting war have to be avoided at all costs.

在全地球经济放缓的时刻，采取与时并进的规章制度是有必要的，特别是在调整收费方面，相信没出国疑问收到确定的效果，但切忌掀起&削价战&。

As a result,the offsprings of the people with entrepreneurial spirit may not able to efficiently use their resources.

所以，假如人们期望市场发挥其高效配置资源的功能，那就根本没有必要去操心成功的企业家退休之时如何安排企业的未来。

Until recently it was assumed that a certain amount of toe spring was necessary to enable the wearer to proceed by a forward rolling action at the joint, but recent studies have challenged this assumption and many now believe that excessive toe spring actually inhibits the foot's natural ability to push-off using the toes.

以前观点认为一定程度上倾对穿着者的前倾动作是必要的，但是最近的研究正在挑战以前的假设，很多人相信过多的上倾实际上将对趾部作前倾运动时起抑制作用。***个人觉得近几年的鞋头不像以前的那么翘了。

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