古老的城堡用坚固的扶壁支撑着高墙。

The ancient castle's high walls were supported by strong ___buttresses.

这些数据有力地支持了我们的假设。

The data strongly ___buttresses our hypothesis.

朋友的支持在危机时刻成为了他的坚强后盾。

His friends' support served as a ___buttress during the crisis.