必不可少

The Stallion Guard leather and chrome cage is another nice short term wear male chastity device, it is not heavy and can be worn for longer periods than most short term devices, it does not need to be removed for urination, although essential for bathing and showering, the Stallion Guard (available from many online stores) is probably one of the better introduction chastity devices due to its lower price and effectiveness.

卫队的骏马皮革和铬笼是另一个好短期磨损男性贞操装置，它不是沉重的，可以穿较长时间比大多数短期设备，它并不需要移除排尿，但必不可少的洗澡和淋浴，该种马卫队可能是一个更好的导言贞操装置由于其较低的价格和有效性。

Coffee and cigar are indispensable for me in the morning.

我早上必不可少的两样东西是咖啡和香烟！

It is essential for me that the coffee and the cigaret in morning.

我早上必不可少的两样东西是咖啡和香烟！

If this gas is used to be in internal combustion engines, fairly good clean-up system is essential.

如果这个气体用于在内燃机是，较好的清洁系统是必不可少的。

Knowledge of the cleavage planes in the material being mined is essential to efficient use of this technique.

知识的卵裂飞机的材料开采是必不可少的有效利用这种技术。

Water resource is a major natural resource and also an essential clement of environment.

水资源是一个较大的自然资源，并也是环境中必不可少的组成部分。

So, in the course of photogrammetry job, it is necessary to calibrate the close shot metric camera, and it is an essential job course to demarcate the digital camera.

因此，在摄影测量的作业过程中，有必要对近景摄影机进行检校，对数码相机的标定是一项必不可少的作业过程。

The indispensable salt in food, prevent the iodine that thyroid disease adds, what leaven dough uses is alkaline, people has sea fish, prawn, kelp, cod-liver oil, produce from deep-sea medicines and chemical reagents, nourishment.

食品中必不可少的盐，预防甲状腺病加的碘，发面用的碱，人们吃海鱼、对虾、海带、鱼肝油、产自海洋的药品、营养品。

Coding theory to explain a very used book, is to learn essential communication signal transmission classic learning materials.

详细说明：讲解编码理论的一本很使用的书，是学习通信信号传输必不可少的经典学习资料。

Let it be known that original rights, conditions of original contracts, coequal with prerogative and coeval with government; that many of our rights are inherent and essential, agreed on as maxims and established as preliminaries, even before a parliament existed.

让人们知道他们原来的权利、他们原来契约上的条件是和帝王的特权平等的，而且是和政府同时并存的。让人们知道我们的许多权利是固有的而且必不可少，早在国会存在之前人们就同意以这些权利为金科玉律并把它们确定为预先必备的权利。

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。