如何使用 "maintenance" 造句

1. The company makes 75 % of its revenues on swimming-pool maintenance and repair . "
它75%的收入来自游泳池维护和维修。
2. Aside from the costs of installation and maintenance , wang notes that bandwidth in china is extremely expensive .
除去安装和维护的成本,王也注意到中国的宽带成本也相当高昂。
3. Dams need better maintenance and desilting .
水坝需要更好的维护和疏通。
4. That means a shorter , lifespan and heavier maintenance .
那意味着更短的使用寿命以及更加沉重的维修费用。
5. Investigator said faulty maintenance was partly to blame .
调查人员说,保养不善是事故原因之一。