不可缺少的

Marine shafting is one of the main parts of ship power installation and alignment calculation is necessary for the safety and reliability of ship.

船舶推进轴系是船舶动力装置的重要组成部分，校中计算是保证船舶推进轴系的安全、可靠工作不可缺少的环节。

The most essential gift for a good writer is a built-in, shockproof s hit detector.

作为一个优秀的作家最不可缺少的天赋，就是一架内设、防震的废料侦测器。

The most essential gift for a good writer is a built-in, shockproof shit detector.

作为一个优秀的作家最不可缺少的天赋，就是一架内设、防震的废料侦测器。

The perfect cake is the sine qua non of the modern wedding .

一个完美的蛋糕是现代的婚礼中不可缺少的东西。

It can compensate the groundwork sinkage and convenient the pipe connection. It is the indispensable automatically compensating device in pipe system of building material, metallurgy, mining, oil, power industries etc.

补偿地基下沉，方便管道的对接，是建材、冶金、矿山、石化、电力等行业的管道系统中不可缺少的自动补偿设备。

Abigail was not only John's wife and mother of his four children. She was his sounding board, his indispensable advisor.

阿比盖尔不仅是约翰的妻子及四个孩子的母亲，她更是约翰不可缺少的顾问。

In addition,weak mGluR7-LI was detected in some other regions of the brain and spinal cord.

而受体蛋白的定位研究对了解受体的功能是不可缺少的。

As a kind of mechanism and means in propulsion with the economic development and the social stableness, the society security system is an indispensable part of a market economy system and are "a stable machine" and "a safe net" in a modern market economy movement.

作为一种推进经济发展和社会稳定的机制和手段，社会保障制度是市场经济体制不可缺少的组成部分，是现代市场经济运行的"稳定器"和"安全网"。

To ensure the reliability to these materials, use must be made of the probability statistical method.

要保证这些材料的使用可靠性，概率统计的方法是不可缺少的工具。

In the development of FADEC (Fully Authority Digital Engine Control) system, it is found that simulation may constitute an alternative tool useful but not complete or substitutive of experimental tests.

而系统仿真技术已成为航空发动机全权限数字控制系统研制的一个不可缺少的基本手段，尽管它无法取代真实的物理试验。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。