英语语法分析

Usea stick to check the depth and firmness of the ground in front of you.

找根棍子来试试水深，和面前地面的硬度。

Usea ladder to reach things high up. See that the ladder is firmly placed, andwhile on a ladder, don't reach too high or too far to one side.

如果要使用梯子拿高处的物品，注意梯子要平稳的放在平整的地面上，站在梯子上不要去拿太高或太远的地方。