To be safe you should go up a ladder one rung at a time.

为安全起见, 登梯子时一步一步爬。

Hold the ladder tightly and move up a rung at a time.

抓紧梯子一级一级地爬。

The small man turned on the hillcrest to stare down at the struggling youth.

这小人子从山顶转身，向下注视着这个奋力爬的少。

I have to wear a petticoat under this skirt to prevent it from riding up when I move.

我必须在裙子里面加一条衬裙, 以防走动时裙子缩。

But our boss started to talk, curassow also has upgrade of toughen one's scalp-brace oneself to rush only.

但是俺们老板都开口了，大鸟也只有硬着头皮。