If there are bridges in your town, they probably have expansion joints, too.

如果你的城镇有桥梁 他们可能也有伸缩缝。

They're called expansion joints, and without them, the bridges would probably have failed a long time ago.

它们被称为伸缩缝，没有它们，它们就是 这些桥梁很久以前就失效了。

Without expansion joints, the concrete would experience much more stress, and you’d be much more likely to end up with a broken bridge.

如果没有伸缩缝， 混凝土会承受更大的压力，并且您更有可能以断桥而告终。

And that’s why bridges have expansion joints: to give the concrete room to expand when it’s warmer outside, and contract back down in cooler weather.

这就是桥梁有伸缩缝的原因：让混凝土有空间在室外变暖时膨胀，并在天气凉爽时收缩。

The cracks and grating are there for a reason: They’re called expansion joints, and without them, the bridges would probably have failed a long time ago.

裂缝和格栅的存在是有原因的：它们被称为伸缩缝，如果没有它们，桥梁很可能早就坍塌了。

" Good grief, so it's your fault those people were killed and I'm having to answer questions about rusted rigging and corroded expansion joints and I don't know what else! " said the Prime Minister furiously.

“天哪，原来那些人被害都是你的问题，而我却被逼着回答那些关于设备生锈、伸缩接头腐烂等等莫名其妙的问题！”首相气愤地说。

And that's why bridges have expansion joints