well-kept

You'd better keep the two aggressive boys apart.

你最把那斗的男孩分开。

I was amazed at how well the hair kept its shape.

我惊诧于发型保持得如此之。

I’m not sure about Johnson—we’d better keep tabs on him until we know we can trust him.

我对约翰逊不太放心——我们最先观察他一段时间，直到我们确信可以信任他。