expansion

Engineers must account for the thermal expansion of steel tracks when designing long-distance railways.

(Chinese) 工程师在设计长途铁路时，必须考虑到钢轨的热胀冷缩。

The rapid expansion of the Roman Empire across three continents required a massive military presence.

(Chinese) 罗马帝国跨越三大洲的快速扩张需要庞大的军事力量支撑。

You must own the base game to install this expansion pack, which adds ten new levels.

(Chinese) 你必须拥有基础游戏才能安装这个增加了十个新关卡的扩展包。

The latest software expansion includes advanced security features for corporate users.

(Chinese) 最新的软件扩充插件为企业用户包含了先进的安全功能。