Installed in a mainline it prevents upstream pressure from dropping below a preset minimum.

We observe a striking shift away from a labor theory among all mainline economists...

我们发现在主流经济学家中间出现了一种偏离劳动理论的显著变化。

The stock-market scandal is refusing to go away, mainly because there's still no consensus over how it should be dealt with...

股票市场的丑闻迟迟没有消散，这主要是因为人们仍未就如何应对它达成共识。

The workforce is mainly made up of women.

员工主要是女性。

The population almost doubles in summer, mainly because of the jazz festival.

主要由于爵士音乐节的缘故，在夏季这里的人口几乎比平时多一倍。

The strike was broken , of course, but mainly by a series of adventitious developments.

罢工是中断了, 但主要还是由于发生了一系列意外事件.

The duties of the post are mainly secretarial.

这个岗位的职责主要是文秘工作.

Her illness was caused mainly by stress.

她的病主要是由精神压力引起的。

The people in the hotel were mainly foreign tourists.

酒店里住的大多是外国游客。

In that connection, let me say this.

在那一方面, 让我这样说吧.

The story is based mainly on traditions.

这个故事主要是根据传说.

I don't go out much, mainly because I have to look after the kids.

我不大出去,主要是因为我得照看孩子们。

He has been poaching on her land for years, poaching mainly fish and rabbits.

数年来他一直在她的土地上偷猎, 主要捕鱼和偷猎兔子.

The African half of the audience was mainly from Senegal or Mali...

观众中有一半是非洲人，其中大多数来自塞内加尔或马里。

The spacious main bedroom is mainly blue.

宽敞的主卧室以蓝色为主色调。

Increased sales during the summer were mainly due to tourism.

夏季销售额增加主要是由旅游业带动的。

We talked about various things – work, mainly.

我们谈了各种各样的事情——主要是谈工作。

The birds live mainly on nectar.

这些鸟主要以花蜜为食。

‘Where do you export to? ’ ‘France, mainly. ’

“你们出口到哪里？”“主要是法国。”

We met with very bad weather again, in which the ship sprung her mainmast.

我们又遇到非常坏的天气, 那只船弯下了它的中桅.

Knowing any man's mainspring of motive you have as it were the key to his will.

你要找的正是这种“原动力 ”,它不一定总是某种高尚的或重要的东西.