他们正在更换旧的井盖。

They are replacing the old manhole cover.

小心井盖，不要绊倒。

Be careful of the manhole cover, don't trip.

他不小心踩到了井盖。

He accidentally stepped on the manhole cover.

这个井盖坏了，需要修理。

This manhole cover is broken and needs to be repaired.

这个街区的井盖都很新。

The manhole covers in this neighborhood are all new.

检查井盖不见了，对行人构成了危险。

The manhole cover was missing, posing a danger to pedestrians.

检查井盖丢失了，对行人构成了危险。

The manhole cover was missing, posing a danger to pedestrians.

为什么大多数井盖是圆的？

Why are most manhole covers round?

放回沙井盖。

Replace the manhole cover.

现在回到井盖。

Now back to manhole covers.