不可或缺

You might not realize it, but mowing the lawn is an essential part of any landscape.

你可能不知道，但草坪修剪是不可或缺的风景。

ABSTRACT: By using image processing software, based on the coordinates of clear points in images and the theoretical coordinates of the points in the reference coordinate system, the coordinate relation multinomial of pre-and post-correction control points can be established by means of the digital image correction technique and the coefficient in the multinomial can be sought on the basis of the coordinates of a certain number of control points.

前言 考古绘图一直是考古学研究中不可或缺的重要技术，能够反映考古遗迹的分布状况或者典型器物的多重特征。但是随着考古学研究的深入和对相关技术手段需求的增加，考古绘图技术却始终停留在通过直尺等量取数据、再使用直尺和铅笔绘图的水平上，成图精度很低，周期较长，图形品种单一，远远不能满足现代考古学研究的需要。

National costume constitutes an important part of any culture.

民族服饰是各民族传统文化中不可或缺的一个重要内容。

It is well known that trees are needful to us.

全世界都知道树木对我们是不可或缺的。

As it was known to all of us that the trees are needful for us.

全世界都知道树木对我们是不可或缺的。

It is universally acknowledged that trees are needful for us.

全世界都知道树木对我们是不可或缺的。

The whole world know that trees are needful for us.

全世界都知道树木对我们是不可或缺的。

The whole world knows that the trees are needful to us.

全世界都知道树木对我们是不可或缺的。

The whole world know that trees needful for us.

全世界都知道树木对我们是不可或缺的。

We are so neglectful of those essential things for our lives: because they are everywhere, and everywhere becomes nowhere.

对于不可或缺的事物，我们往往却是漫不经心的：因为它们的常态是存在，而常态会在常态中慢慢迷失。

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。