需要时

The two flows can be solved simultaneously and no boundary condition is needed on the interface between them. The implicitly limitation of Continuity Equation makes it sure that the velocity and pressure of the two flows on the interface keep to equal at any time.

数值计算时，波浪与孔隙流的交界面不需要给定边界条件，而是通过连续方程的隐式约束，保证两种流态在边界上的速度和压力匹配，实现了波浪场与孔隙流场的同步耦合。

When neither equipment nor auxiliary grounds are available an equipotential bonding system may need to be used.

当设备或其附件都没有接地时，就可能需要运用一个能够保证等电位的连接系统了。

When neither equipment nor auxiliary grounds are aailable an equipotential bonding system may need to be used.

当设备或其附件都没有接地时，就可能需要运用一个能够保证等电位的连接系统了。

Secondly, the influence of components in non-supply path is equivalently combined to the "juncture" in supply path.

因此在计算负荷点的可靠性指标时，只需要对供电路径上的元件和该连接点进行简单的计算。

Because of the fatal differs between large-scale and mesoscale weather systems, such problems as relevant model of background error, representativeness of observation data and observation error structure still need to carry on deeper research.

鉴于中尺度和天气尺度天气系统之间的巨大差别，在中尺度资料三维变分同化时，背景误差相关模型的设置、观测误差结构和观测资料的代表性等方面还需要进行更加深入的研究。

Magflow meters have found application in the process control industries (chemical, food-and-beverage, pulp and paper, water treatment) because they have low measurement error (0.2% of reading attainable) over a broad range (typically 30:1) and they require no moving parts (unlike turbine meters or paddlewheel technology) or flow restriction (unlike differential pressure meters) to operate.

因其在一宽广范围（通常为30：1）内具有低的测量误差（可达到读数的0.2％）且其在工作时不需要使用运动部件（不同于汽轮计或桨轮技术）或流量限制，磁性流量计已在过程控制行业（化学、食品及饮料、纸浆及造纸、水处理行业）中得到应用。

There has never been a time in history when the terms Eschatology and progressive liberalism have meant more yet it is also a time when speaking rationally of either of them would first require a very specific definition for both.

从来没有一个历史时刻的条款时，末世论和渐进的自由主义意味着更多的但也是一个合理的时候讲的其中一人将首先需要一个非常具体的定义，两者兼而有之。

Not only space-time coding in the MIMO but also demodulation in the OFDM, the rather exact CSI is essential parameter for dealing with data in the MIMO-OFDM.

在MIMO-OFDM系统中，不论是对MIMO进行空时处理，还是对OFDM进行相干解调，都需要较为准确的CSI作为数据处理的必要参数。

As with any ethylene oxide treatment, humidification is necessary.

在使用环氧乙烷灭菌时需要控制湿度。

Such as the beverage trademark Coca Cola, there is no meaning of its own, translated as "Coca-Cola", the method is based on a transliteration-based, but the transliteration of Chinese characters when they are not taken according to the rules of the selected sound and meaning, but to use the Chinese language in a special language phenomena - euphony, see at a glance the catering commodities for consumers need to purchase food is naturally meaningful.

就像如饮料商标Coca Cola，其本身并无含义，译为"可口可乐"，所用方法以音译为主，但音译时所取地汉字并不是按音义地规则选取地，而是利用了汉语中地一种特殊语言现象——谐音，一看便知是饮食类商品，对于需要购买预购饮食地消费者来说自然是意味深长句号。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。