non-usable part
non-usable部分
以上为机器翻译结果，长、整句建议使用 人工翻译 。
Non-uniform settlement of the part of building(box culvert) crossing the levee of Dongting-lake appears in its usable life affects its operation, and even leads to rupture.
洞庭湖部分穿堤建筑物（箱涵）运用期间发生不均匀沉陷，影响运行甚至破损断裂。
youdao
应用推荐
模块上移
模块下移
不移动