1.
Pressure should not fall below 30 psi for five minutes.
压力应该下降到低于30 psi，并保持5分钟。
2.
When the room temperature drops below a preset value, the thermostat switch closes turning on the furnace
当室温下降到低于预定值时，热继电器开关闭合，使炉子打开。
3.
Prices have reached rock-bottom.
物价已下降到最低点.
4.
To let, bring, or move down to a lower level.
降下让降到一低水平，带到或移到低方位
5.
Drop below
降低到……减至……
6.
3.5 Reduce calcium ion below 100 ppm by adding Soda Ash.
加入纯碱以降低钙离子浓度到低于100ppm。
7.
The reputation of the conjurer was rapidly sinking below zero.
魔术师的信誉一下子下降到最低点。
8.
fall or drop to a lower place or level.
下沉或下降到一个较低的位置或水平。
9.
Turnover rates are marinally lower in Shanghai and Beijing -- about 12%, down form roughly 15% last year.
上海和北京的人事变动率略低于此，由去年的15％下降到今年的12％。
10.
Descend to your minimum altitude if not broken contact pull up and go around.
下降到你的最低高度，如不能见，复飞。
11.
A decline to a lower status or level.
降，下来倾斜到更低状态或水平
12.
A decline to a lower condition, quality, or level.
退化下降到低等的状况、性质或水平
13.
The demand for money can be brought to a minimum.
对货币的需求就会下降到最低水平。
14.
The pilots dropped to the altitudes under 500ft.
飞行员将飞行高度降低到500英尺以下。
15.
At the same time, men’s age at first marriage also dropped to the lowest point, younger than 23 years old.
同时，男性的初婚年龄也降到最低点，低于23岁。
16.
Descend to your minimum altitude, if the runway is not in your sight, pull up and go around.
下降到你的最低高度，如看不到跑道，拉起复飞。
17.
A sudden drop from a relatively erect to a less erect position.
突然俯身低下从垂直方向上相对高的位置降到低的位置
18.
decline to a lower status or level.
降到一个低的地位或降低身份。