在山顶修筑了防御工事
这微醉的人生呵，如何安放你我的青春？
1·For cases like this the system will have a watertight structures called caissons, which are based on the suction-pile technology used to emplace deep-sea moorings and foundations.
象这种情况，该系统将有个被称作沉箱的水密结构，沉箱基于用来安放深海锚定和地基的吸力桩技术。