For children from poorer families, the main hope of social mobility is through education.
对于贫穷家庭的孩子来说,提高社会地位的主要希望是通过教育。
The main channel of the mobility is Ke-ju system.
流动的主要途径是科举制度。
Ion gate is one of the important parts in an ion mobility spectrometer. The main function of the ion gate is to control the ions to fly into the drift tube in pulse mode.
离子门是离子迁移谱仪的一个重要部件,主要作用是用来控制离子以脉冲的方式有效地进入迁移管。
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