void tower的用法和样例：
例句
- Another support power to keep in mind is the Mine Drop which is one of the few reasons to get an Air Tower before teching up.
另一个要牢记的支援力量是布雷，这也是在攀科技前先造空塔的原因之一。 - Unlocked by construction of an Air Tower, this is irritating at the best of times and a royal pain in the backside at the worst of times.
布雷能力在建造空塔后可用，它可以锦上添花，也可以在逆境中致你于死地。
