下层

Reducing gear drives cam rotate to top half-turn and link gear of upper gate move, top disc opens and discharges. Spring device makes disc close and replace with displacement of cam. When cam rotates to bottom half-turn link, gear of sub-layer gate moves, below disc opens and discharges. The disc closes little by little with the displacement of cam. These two actions maintain a closed state of either disc on the pipe. So it can discharges and lock air at the same time.?

减速装置带动凸轮旋转至上半圈时，上层阀门的连杆机构互动，阀板逐渐打开卸灰，随着凸轮的旋转，弹簧机构使阀板逐渐关闭复位；凸轮旋转至下半圈时，下层阀门的连杆机构互动，阀板逐渐打开卸灰，随着凸轮的旋转又使阀板逐渐关闭，这样两个动作使管道上阀板始终有一个是关闭状态，因而，可使卸灰与锁气同时达到目的。

The handicraftsman employed by the local authority produced according to the will of the local authorities and they had no freedom of production.

因此，战国时期传统的家族形态已经不复存在，无论是社会上层、中层，还是社会下层的家族形态，基本上奠定了中国几千年来家族形态的基础。

And in giving such people a chance to be themselves, he saw himself as a champion of th Souths hardscrabble underclass, both black and white

他给了这些人一个"成就自己"的机会，同时将自己看成是南方那些贫困的下层人民的声援者。

And in giving such people " a chance to be themselves," he saw himself as a champion of th South's hardscrabble underclass, both black and white.

他给了这些人一个"成就自己"的机会，同时将自己看成是南方那些贫困的下层人民的声援者。

And in giving such people a chance to be th emselves, he saw himself as a champion of th Sou th s hardscrabble underclass, bo th black and white

他给了这些人一个"成就自己"的机会，同时将自己看成是南方那些贫困的下层人民的声援者。

One who is somewhat cultured;one who is neither highbrow nor lowbrow .

文化教养一般的人；中产阶级趣味的人受过某种程度教育的人；既非上层又非下层的人

Unlike James and Howells, Mark Twain wrote about the lower-class people, because they were the people he knew so well and their life was the one he himself had lived.

不像詹姆斯，豪马克吐温写的是下层人，因为他知道这么好，人民生活是一个他自己的生存环境。

Hypolimnion The lower noncirculating water in a thermally stratified lake.

下层滞水层，均温层：在热层结湖中位置较低的不循环水层。

However, it has two main drawbacks: incongruence between overlay and IP-network, and the lost of information due to hashing.

然而，它有两个主要的缺点：上层逻辑网路和下层实体网路的不一致性，以及混乱编码导致珍贵的资讯遗失。

The undergrowth was so thick that we had to force our way through in Indian file.

下层灌丛太密，我们只得成纵队行进。

As she looked at Warrington's manly face, and dark, melancholy eyes, she had settled in her mind that he must have been the victim of an unhappy attachment.

每逢看到沃林顿那刚毅的脸，那乌黑、忧郁的眼睛，她便会相信，他一定作过不幸的爱情的受害者。

Maybe they'll disappear into a pothole.

也许他们将在壶穴里消失