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
Maybe.
也许是。
The doctor discovered that I'm a little overweight.