检修
We must maintain a firm attitude. 我们必须采取坚定的态度。
He is too poor to maintain his family. 他太穷了，无法养活家人。
A substance believed to maintain life indefinitely. 长生不老药被认为可以使生命无限的物质
The plan is merely designed to maintain their nuclear superiority. 制定这个计划只是为了保持他们的核优势。
The factory cannot maintain current levels of production. 该工厂不能保持目前的生产水平。
He can't maintain enough equilibrium to ride a bike. 他骑自行车不能保持平衡。
