It is a necessary and desirable part of the developmental sequence.

Internal fracture fixation material is now an indispensable material in bone repair.

骨折内固定材料是骨修复中不可或缺的重要材料.

Public transport is a lifeline for many rural communities.

公共交通对许多农村居民来说是不可或缺的.

What lungs are to the animal, leaves are to the plant.

就像肺是动物所不可缺的一样, 叶子也是植物所不可或缺的.

Since you knew that she is my girlfriend, why did you ask the question?

你早就知道她是我女朋友了, 怎么还要明知故问 呢 ?

Isn't that asking the question knowingly?

这岂不是明知故问 吗 ?

These conservative opinions are shallow and limited, and not worthwhile to promote.

这种保守的观点是井蛙之见, 不值得提倡.

It was dark around as in those days when she lay hidden in the bulb.

这朵花儿躺在里面,四周是漆黑一团,它正如躺在花球根里的时候一样.

Was the situation in those years all dark, or was its bright side dominant?

是漆黑一团, 还是光明是主要的?

It was forbiddingly dark in the corridor.

走廊里漆黑一团.

It was dark and vague outside.

门外一片茫茫,漆黑一团.

If I open am for ever in the black adiaphane.

倘若我睁开眼睛,我就将永远呆在漆黑一团的不透明体中了.

I am still completely in the dark about the matter.

这个问题在我的心中还是漆黑一团.

It was cold and hard, and like nothing else in his black universe.

它又冷又硬, 在他漆黑一团的宇宙中它什么也不象.

He is still completely in the dark about the matter.

这个问题在他心中还是漆黑一团.

There is ability and learning is the most important, followed by the need luck.

有真才实学是最重要的, 其次要有运气.

But to publish articles in major journals abroad-that took real talent and scholarship.

可是在外国大刊物上发表作品,这非有真才实学不可.

But what about their intellectual equipment?

然而他们是否有真才实学 呢 ?

It good to know so many friends, relax and someone will come and help you.

见闻广博,交友满天下,贵人也多, 放心会有人主动帮助你的.

Well, I think it's extremely informative.

喔, 我认为它见闻广博.

His mind is well stored with facts.

他见闻广博.