必需的

Thus, epidermal differentiation is required for proper morphogenesis of mesodermally derived skeletal elements.

因此，表皮分化是中胚层来源的骨骼成分正确形态发生必需的。

It isn抰 the most fun part of either one of our days, but it has to be done.

这不是一项有趣的工作，但是这是必需的。

These forms of mucous are necessary to the heath and well being of the crystalline form.

这类黏液对水晶体的健康和良好状态是必需的。

This book is essential for everyone that is trying to get out of the mundaneness of living from paycheck to paycheck.

这本书对任何试图逃离从薪水到薪水世俗生活的人而言，是完全必需的。

This book is essential for everyone that is trying to get out of the mundaneness of living from pay check to pay check.

这本书对任何试图逃离从薪水到薪水世俗生活的人而言，是完全必需的。

The sufficient and necessary conditions for team localization are proposed.

对于队局限的充份和必需的情况被计划。

Then outlaw nonessential,"have to have it now " spending.

对他的想要不予理会，而现在必需的就买。

Recent research on maternal-fetal interface has suggested the decidual tissue plays an integral role in normal pregnancy and.

母胎界面生物学与多种细胞形成的复合物及维持妊娠所必需的调节因子有关。

The value parameter is optional; if it is eliminated, the variable is set to a null value.

两边的空格是为了更可读，实际上，它们不是必需的。

A plan for the solution of a problem; consists of planning and coding, numerical analysis, systems analysis, specification of printing formats, and any other functions necessary to the integration of a computer in a system.

为解决某一问题而作出的计划，包括规划和编码、数值分析、系统分析、打印格式规定以及把计算机结合进一个系统所必需的其它功能。

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。