Sid
[计] 安全性标识
🗣️ 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？
Knowledge will not be aquired without pain and application.
不花力气，不下功夫是得不到知识的。
There is a new type of machine which can produce colour copies.
有一种新型的机器能够制作出彩色复印件。