必不可少

The relationship between market access and exit is studied.They both have the same reason for their existences in market.

市场进入与市场退出是组成市场的两个必不可少的方面，两者之间存在着密切的联系。

And, since there must always be an observer, a reader for the word, there was a finger to mark it, and a page to hold it, and an outstretched palm to support the heavy book, and eyes that were not quite eyes to read it.

但是，有的东西必不可少的是，必须要有见证这一切那个的人，要有阅读文字的那个人，写下文字的手，承载文字的纸页，托住这本沉重书的手掌，还有眼睛，阅读这些文字的眼睛。

Youth have the slightest of sadness about it, they added a touch of the young Dai-color, such as ink painting in the outlines and charm that few strokes, but not many, but essential; youth, there are many cheered, they are young, gorgeous in color, Qingyun streaks of blue sky like floating, it seems the grass full of flowers.

青春有一丝丝的忧愁，便为青春添上了一抹黛色，像是水墨画中勾勒出神韵的那几笔，不可多、但必不可少；青春有许多的欢呼雀跃，它们是青春中绚烂的颜色，似飘着几缕轻云的碧空，似开满鲜花的草地。

Integrating folk customs, the folk belief thus became a basic part of the life of people in Han dynasty.

民间信仰与习俗相结合，成为人们生产生活中必不可少的组成部分。

There are also other customs and traditions used to celebrate Harvest Festival. For example, church bells sound on each day of the harvest, and a corn doll is made from the last sheaf of corn harvested. The corn doll often has a place of honor at the food table, and is kept until the following spring. People also put flowers and colorful ribbons on the last cart of food harvested, and most families have a wonderful harvest meal.

学校秋收节还有一些其它的传统习惯，例如：教堂的钟声在人们收割的每一天都响个不停；人们要用最后一束庄稼打下的粮食做成洋娃娃，就餐时这个洋娃娃要被放在餐桌上的显要位置上，直到来年的春天；最后一辆拉庄稼用的马车也要放上鲜花、系上五颜六色的彩带；与此同时，每家庆祝丰收的美餐也是必不可少的。

The movement of energy will also foster the ascent of all land, and so is a necessary shift to allow for continued global ascension.

能量运动也将培育一切大地的提升，因此是一个允许全球继续提升的必不可少的转变。

No matter how a splendid freight bill, the necessary knowledge and ability are extremely important, careful and the sense of responsibility is essential

不管怎样一名出色的跟单员，必备的知识和能力是非常重要的，细心和责任心更是必不可少。

In the mining industry, metallurgical industry, machinery manufacturing, civil engineering, petrochemical industry, refrigeration and gas separation project and the defense industry, the compressor is essential for one of the key equipment.

在采矿业、冶金业、机械制造业、土木工程、石油化学工业、制冷与气体分离工程以及国防工业中，压缩机是必不可少的关键设备之一。

Geomancy feng shui geomancers activities is an important measurement tool indispensable.

是风水师堪舆风水活动必不可少的重要测量工具。

Breaking Glass Table with Air Cushion is designed to separate the glass panes after cutting.

该设备用于玻璃切割后的分片处理，是自动切割生产线必不可少的设备。

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。