英语语法分析

The Army bought thousands of handheld laser dazzlers for infantrymen to use at checkpoints.

美军购买了大量的手提激光眩目器供步兵在检查站使用。

When cavalry and infantry engage in battle, one cavalryman is equivalent to how many infantrymen?

用骑兵与步兵战斗，一名骑兵相当于几名步兵？

The two saw plenty of action at Outpost Harry and as infantrymen spent a good deal of time on the front line.

作为步兵，这两个人在哈里前哨观察所看到了大量的行动，在前线共同度过了不少时光。