它们大的有数十吨，高数米到几十米，小的可摆放在室内观赏。

They have dozens of tons with the size ranging form several meters to tens of meters and l can be placed in indoor ornamental.

助推器和增强器是将停滞空气推成高数倍的液压空气的实用设备。

Boosters and Intensifiers are practical devices that multiply shop air into higher hydraulic pressure.

我的有高数、C语言、微机接口技术、计算机网络和数据库技术。

I have to take advanced mathematics, C Language, Microcomputer Interface Technique, Computer Network and Database Technique.