必不可少

Gantry crane is absolutely necessarily equipment in our national development of economy.

门式起重机是我国国民经济发展必不可少的设备。

The research of the surveillancemechanism of GATT is the basis of the research of the surveillance of WTO.

WTO对GATT的继承性决定了这是WTO监督机制研究必不可少的一部分。

Based on the relationship between the structure and function, a lot of research have been performed on predicting base-pair which is indispensable to the RNA three-dimensional strcutrue. The tools and methods in Combinatorics and Statistics will play important roles in studying linear sequences of biomolocular units . Similarly, we can present the geometric representation of biological sequences and structures. So the genometric topology and group theory are important also.

根据RNA的结构与功能的关系，在预测碱基配对的类型方面进行了相当多的研究，这也是确定RNA三维构象的必不可少的一部分，组合学和统计学的工具和方法在研究生物序列和生物结构上起到了很大的作用，同样我们可以用几何方法来表示生物序列和二级结构，几何拓扑和群论也起到了很大的作用。

This is essential reading for anybody with an interest in geometry.

这是必不可少的人阅读与几何的兴趣。

Oxygen in the air is essential for seed germination and good growth.

空气中的氧是必不可少的种子发芽和生长良好。

When she got back to the house, like as not the phone would be ringing as the girls remembered further essential items: marrons glacis and you will make a cake Mum, won't you?

等她回到家，很可能电话铃在响，是女儿们又想起了什么必不可少的东西：栗色糖汁，而且你给烤个蛋糕吧，妈妈？

Glycine is necessary for the synthesis of purines, and is a basic compoent of PORPHYRINS.

甘氨酸在嘌呤的合成中是必不可少的，也是卟啉的基本组成。

It is carved gravure gravure printing and high speed is essential.

它对于雕刻凹印和高速凹印是必不可少的。

When the highway where is soft ground is built, groundsill transact which is the bad geologic condition is indispensable for large tract in china.

但是由于中国地域辽阔，不良地质情况经常可见，而在这些地方修建高速公路，软基处理是必不可少的。

The study didn't have a placebo group for comparison, generally considered necessary for a conclusive result.

研究没有设置服用安慰剂的对照组，通常要得出决定性的结论，对照组是必不可少的。

I can not make it blossom and suits me

我不能让树为我开花

When temperatures are above approximately 80 °C discolouration of the raceways or rolling elements is a frequent feature.

当温度高于 80 °C 左右时，滚道或滚动元件褪色是很常见的特征。