They tried to cajole a callow boy to carry the caisson.

他们试图哄骗一名没有经验的男孩来扛弹药箱。

Working conditions in these caissons were dismal and dangerous.

这些沉箱中的工作条件恶劣且危险。

They placed layers of stone on top of the caisson as they dug.

他们边挖边在沉箱上面放上一层层石头。

This work was done in underwater chambers called " caissons."

这项工作是在称为“沉箱” 的水下舱室中完成的。

Anchors and winches are used  to position the caissons, which are ballasted with  water to keep them stable.

锚和绞盘用于定位沉箱，沉箱用水压载以保持稳定。

Barr's thorough technological history discusses not only how caissons work, but also the dangers involved.

Barr 详尽的技术史不仅讨论了沉箱的工作原理，还讨论了所涉及的危险。

These caissons were used to build the bridge under the water.

这些沉箱用于在水下建造桥梁。

As it turns out, working in these caissons was very dangerous.

事实证明，在这些沉箱中工作是非常危险的。

But with extra troops required to do it right the caissons are not being used to limit the number of people interacting.

但由于需要额外的部队来执行任务，为了减少人们接触的次数，目前不再使用沉箱了。

This is probably why hundreds of people who worked on the Brooklyn Bridge eventually became sick with caisson disease.

这可能就是数百名在布鲁克林大桥上工作的人最终患上沉箱病的原因。