head of steam短语⁹⁶⁶⁷⁷⁺⁶ 例句 Google’s operating system, Android, is also building up a head of steam, and is now available on a wide variety of well- designed, easy-to- use handsets that offer plenty of innovative features. 谷歌的操作系统 Android，也正加速开拓市场，现在许多精心设计、易于使用同时又提供大量新颖功能的手机都使用这种操作系统。 yeeyan