必不可少

Blowdown short-duration facility and the measurement methods are presented in this paper.

1前言涡轮性能试验对涡轮的设计与优化是必不可少关键环节。

Zinc- is essential to good health as it is involved in many enzymatic reactions in every cell of the body.

锌-是必不可少的良好的健康，因为它涉及许多酶促反应在每一个细胞的身体。

In my opinion, bonding with family and friends is essential.

在我的意见，与家人、朋友发展信赖和亲切关系是必不可少的。

These reforms are essential to boosting the productive capacity of our economy.

我们认为这些改革对提高我们经济的生产能力是必不可少的。

Using the professional knowledge management team to manage the knowledge of enterprise. It will bring into effect in better way.

营造一个知识共享的企业文化也是必不可少的一部分。

With the development of medical technologies, endoscopes such as gastroscope, bronchoscope have become widely used in clinical practice.

随着医疗卫生事业的发展，内窥镜的使用日益广泛，已成为医疗单位必不可少的检查和治疗设备。

A higher humidity can benefit your budgerigar, but is not essential.

较高的湿度可以受益的虎皮鹦鹉，但不是必不可少的。

Fresh air and direct sunlight for at least part of the day is essential to the well-being of your budgerigar.

新鲜空气和阳光直射，至少部分的一天是必不可少的福祉的虎皮鹦鹉。

It was essential to the military, providing 'bugle calls' and was apparently borrowed from the Etruscans.

这是必不可少的军事，提供'号角召唤'和伊特鲁里亚人显然是借用了。

Protein is a great choice for a snack because it is the building block for every cell.

蛋白质是小吃必不可少的选择，因为它是每个细胞的基础。

I didn't watch TV last night, because it .

昨晚我没有看电视，因为电视机坏了。

Since this year, in a lot of villages of Beijing, TV of elevator liquid crystal was removed.

今年以来，在北京的很多小区里，电梯液晶电视被撤了下来。