下阀芯起开关作用。
晶体管可以说是微电子中非常重要的器件，它最主要的功能是电流放大和开关作用。
Transistor is viewed as a very important amplification and switching device in micro-electric field.
进出水口有二个单向阀，水箱内置有浮球装置，该装置和二个单向阀共同起开关作用；
There are two one-way valves for water inlet and outlet, which cooperates with floating ball in water tank to play switch role.
基因“开关”涉及乙酰化作用，也就是将乙酰基群在染色质的DNA水平上引入到分子中，由此完成基因转录。
The genetic switch involves acetylation, the introduction of an acetyl group into a molecule at the DNA level of chromatin resulting in genetic transcription.
它有很多可以作用于结果的强大的开关和选项，我还没有讨论到——比如指定关联性。
It has quite a few powerful switches and options to productions that I have not discussed — for example, specifying associativity.
组蛋白还起到了基因开关的作用，因此它们编码的信息可以被复制并且传递到细胞的其它部位。
Histones also play a role in turning genes on so that their coded instructions can be copied and sent to other parts of the cell.
你可能已经设计出拥有很多很酷的功能的最新设备，但如果我们不能找到开关，它还能有什么作用呢？
You might've designed the latest gadget with all the handiest features - but if we can't find the "on" button, what impact does it have?
——这种有机单分子层的化学性并不是临界的；开关与许多不同的分子一道起作用，开关也能与许多不同的自我组装分子电子系统一块使用。
The chemistry of the organic monolayer is not critical; the switch works with many different molecules and so can be used with many different self-assembled molecular electronics systems.
到目前为止您已经了解了- e和-M开关所起的作用：导入模块和运行语句。
So far you have seen the -e and -m switches in action: import a module, and run a statement.
现在，Spiegelman和他的同事们已经确定了两种起分子“开关”作用的蛋白质，它们是产生灰色脂肪的关键。
Now, Spiegelman and colleagues have identified two proteins that act as molecular "switches" to turn on the production of brown fat.
黄绿色的车厢里有三层的卧铺，空气不太流通。除了灯光开关，暖气、电扇、喇叭开关仅仅可以拨动，除此之外没有任何作用。
My pistachio green, airless compartment had three bunk beds and, apart from the light, none of the switches - heater, fan nor loudspeaker - did anything other than move.
它在开关门时的摇晃使得开门不方便，但是它们确实起作用。
They make the door difficult to swing open and close, but they work.
门后。我真的不喜欢在门后悬挂整理袋。它在开关门时的摇晃使得开门不方便，但是它们确实起作用。
Behind the door. I'm not really a fan of hanging organizers on doors. They make the door difficult to swing open and close, but they work.
比如，如果你按U键，会展开关键帧，但是如果你没有关键帧，就不起什么作用。
Such as if you hit the U key, it displays all keyframes, but if there are no keyframes, it shows nothing.
在数字电脑里，它的作用是一个开关。
当臂杆运行到上下两个极限位置时，分别压下限位开关，切断主控电路，变幅电机停车，达到限位的作用。
When the arm runs to the upper and lower two limit position, respectively press the lower limit switch, cut off the main control circuit, variable amplitude motor parking, to limit the role.
布尔代数所需的推理过程是通过开关来实现的，这些开关起着逻辑电路的作用。
The reasoning process called for by Boolean algebra are implemented through switches acting as electronics logic circuits.
检查控制盘内外部各操作和自动元件有无异常，各操作用防护开关是否关闭或者在停止位置。
Examine the control panel, operating instrument and auto components, all the protection switches are on OFF position or STOP position.
成功的界面设计都是完美地处理好功能性、情感性、性别性之间的关系，强调开关的界面设计对功能性有着互助作用的。
Successful interface design is perfect to handle the the relationship of function, emotion and gender, underlining the switch interface design to have a mutual aid on the functional role.
二元关系的闭包运算在网络、语法分析以及开关电路中的故障检测和诊断等领域有着重要的作用。
Closure operation of binary relation plays an important role in network, parsing and detection and diagnosis of malfunction in switch circuit.
限位行程开关，起到安全和限位作用。
这个浮球是一个直接作用的浮控开关。
该系统可准确地监测水位大小及水泵的开关状态，对安全生产调度起着很重要的作用。
The system may precisely monitor water level and pump on off status, playing an important role in safety production dispatching.
本文介绍了开关磁阻电机调速系统中电流检测器的特点和作用。
This paper reviews the characteristics and functions of current detectivedevice in the speed regulation system of the switched reluctance motors.
用模拟电子元件和数字电子元件设计一种智能开关盒，介绍这种装置的作用和工作原理。
An intelligence switch box is designed by use of analogue electronic elements and digital electronic elements. The paper introduces the functions and working principle of the device.
采用腔内机械转盘开关，发现当激光作用时间逐渐变短至毫秒量级时，仍可观察到该现象。
When the period of laser action was reduced to the order of millisecond by using a mechanical rotating switch within the cavity, this effect could still be observed.
这个分子，一定程度上起到了控制乙肝病毒“开关”的作用。
This molecule, to a certain extent played a controlling hepatitis B virus "switch" role.
在电力系统中，高压开关的控制和保护作用，对电网的安全运行至关重要。
In power system, the control and protection function of high-voltage switchgear is of most emergent importance to the safety operation of power network.
就拿气缸举一个例子好了，在气缸方面，磁性开关的主要作用就是检查气缸活塞的运作情况。
Take the cylinder to give an example, in the cylinder, the main role of the magnetic switch is to check the operation of the cylinder piston.
就拿气缸举一个例子好了，在气缸方面，磁性开关的主要作用就是检查气缸活塞的运作情况。
Take the cylinder to give an example, in the cylinder, the main role of the magnetic switch is to check the operation of the cylinder piston.
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