Polydialkysiloxane
聚二烷基硅氧烷
🗣️ 情景例句
During your computer classes, did they teach you how to fix a cooling fan?
在你的电脑课程，他们是否教过你如何修理散热风扇？
How often did I tell you not to speak so loud?
我告诉你多少次不要讲话这么大声?
I get up at six o'clock.
我六点起床。