The supports under the bridge were starting to bend.

桥下的支柱开始弯曲。

Boats pass under the bridge.

船从桥下通过。

He was relieved his time in jail was over and regarded it as water under the bridge.

他对自己的刑期已满而感到如释重负，把那视为桥下之水过往之事而不再挂怀。

Very warily he paddled up to the mouth of the creek, and was just passing under the bridge, when ... CRASH!

他小心翼翼地划到河湾口，正从桥下经过，突然……哗啦一声！

The boat is passing under the bridge.

船正从桥下通过。