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It is necessary to provide psychological consultatin for women who used to have birth defect child.

应特别关注该特殊群体，对其加强心理健康的指导和心理干预。

Considering the factors such as randomness of natural lightning locus and the coexistence of primary and secondary leaders, it is necessary to lead in the concept of dynamic lightning protection shielding angle. It is suggested that the angular bisector of practical protective angle formed by ground wire or earth pin in UHVAC transmission line and conductor should be aligned with the direction of lightning leader as well as the ratio of vertical span to horizontal span and the impact of wind speed should be considered.

考虑自然闪电轨迹的随机性和雷电主先导与次先导并存现象等因素，有必要引入动态防雷保护角概念，建议特高压交流线路中地线对导线的实际保护角形成的角平分线应与雷电先导的来向一致，并应计及垂直档距和水平档距的比值和风速的影响。

Since these questions cannot be satisfactorily explained by existing researches, it is necessary to study personality bisexuality from other angles of view.

对这些问题，已有研究似乎还不能很好的回答。

Because the bismuth product structure is simple, so developing the bismuthic deep process product is necessary.

但是铋产品结构比较单一，进一步发展铋的产品深加工很有必要。

Bit by bit, he makes the necessary changes to make his language like other people's.

一点一滴，他作了必要的修改，使他的语言和其他人一样的。

Bit by bit , he makes the necessary changes to make his language like other people's.

逐渐地，他获得必要的变革使他的语言象其他人一样。

Since a raw file does not have any header, it is necessary to know a priori the width, height, and bit depth.

由于原始文件不具有任何头，有必要了解一个先验的宽度，高度和位深度。

Based on the invariance of maximum likelihood estimation, the sufficient and necessary condition under which the maximum likelihood estimation has invariance for the parameters are given, then it uses this conclusion to calculate the maximum likelihood estimation of σ^2 and ρ for bivariate normal distribution.

根据参数极大似然估计不变性原则，给出在一定条件下极大似然估计具有不变性的充分必要条件，并利用该结论计算了二元正态分布Z=的未知参数σ^2和ρ的极大似然估计值。

On February 14 (Valentine's Day), I have always questioned on this day, sometimes I say to me that it is not necessary to celebrate the love and the friendship in only one day of the year, and bla bla bla .

在2.14（情人节，我总是会这样问，我对自己说，有必要在这一年只有一天的节日里庆祝爱情和友情，诸如此类吗？

Print in color when it is absolutely necessary, but if not, just use black ink.

在彩色印刷时是绝对必要的，但如果没有，就用黑色墨水。

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。