up to scratch
达到标准, 合格, 处于良好状态
例句与用法：
A pianist has to practice every day to keep up to scratch.
钢琴手要天天练习才能保持高水平。
We'll have to bring the house up to scratch before we sell it.
我们得把这所房子维修一下再出售。
Is her schoolwork up to scratch?
她的功课行吗?
达到标准
The piano player was not feeling well and his performance wasn't up to scratch.
这位钢琴演奏者身体不舒服, 他的演奏没达到平日的水平。