caisson
n
1 large watertight box or chamber in which men can work under water (eg when building foundations) 沉箱(工人进行水下作业, 如建底座时所乘的大潜水箱).
2 large box (usu on wheels) in which ammunition is carried 弹药箱; (通常为)弹药车.
🗣️ 情景例句
I'm leaving for Beijing on a four-day tour.
我马上要去北京旅游4天。
Is there any chance of my borrowing your typewriter?
能不能借用一下你的打字机?
It was raining heavily and they found that a stream had formed in the field.