救兵的英文：
reinforcements

The urgency to dispatch relieving troops or reinforcements is similar to that of fire-fighting
救兵如救火

The designer chooses the layout of reinforcement.
设计者选择钢筋布局。

Will you take measures to reinforce them?
有加固措施吗？

They had to reinforce the center.
他们必须加强中央的权威。

That concrete is reinforced with steel beams.
那混凝土是用钢筋加固的。

This roof needs some reinforcement.
这屋顶需要加固。