这类灾难非常见，只是密西西比河大桥的事故却引发出一个广泛问题：老式的基础结构往往暴露出其承载量总比当初设计时还要多。

Such catastrophes are rare, but the Mississippi River Bridge highlights a wider problem: old infrastructure is often exposed to much greater loads than it was originally designed for.

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如果平台的承载满100%，控制箱上的灯亮起来，同时嗡音器就会发出声音。

When the platform is loaded to 100% of capacity, the light on top of the control box will burn and a buzzer will sound.

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如果平台的承载满100%，控制箱上的灯亮起来，同时嗡音器就会发出声音。

When the platform is loaded to 100% of capacity, the light on top of the control box will burn and a buzzer will sound.

youdao