However, bacteria fix the gas only when their population is high enough to trigger the quorum-sensing machinery.
然而，只有在细菌（根瘤菌）达到一定数量时引发群体感应机制才能进行固氮。
The trigger effect of gas fluid, especially the important effects of special characteristics of ultra-critical fluid on the eruption of mining shocks are discussed.
进一步介绍了瓦斯流体对矿震的触发作用，尤其超临界流体的特殊性质在矿震发生中的重要作用。
The circuit including the main welding circuit, shows the interface, watch dog circuit, sampling circuit, trigger, synchronous circuit and electromagnetism gas valve etc.
包括焊接主回路、采样电路、触发电路、同步电路、电磁气阀启动电路、显示界面以及看门狗等电路。
The accident started with a gas leak that let gas pour into the main tunnel and trigger an explosion due to poor ventilation.
事故由瓦斯泄露引起，在通风不畅的情形下，瓦斯涌入主要通道，引发了爆炸。
The accident started with a gas leak that let gas pour into the main tunnel and trigger an explosion due to poor ventilation.
事故由瓦斯泄露引起，在通风不畅的情形下，瓦斯涌入主要通道，引发了爆炸。
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