a short stay in hospital

短期住院

I visited a lot of temples during my stay in Kyoto.

我在京都逗留期间参观了许多寺庙。

stay for dinner

留下来吃饭

She stayed ( at ) home (= did not go out to work) while the children were young.

孩子们还小的时候她留在家中(没去上班)。

I went to Ningxia and stayed there for one year, teaching as a volunteer.

我去了宁夏，在那里支教待了一年。

stay at / in a hotel

住旅馆

stay the night / stay overnight / stay over

过夜

We promised to stay friends for ever.

我们约定永远做朋友。

We must stay competitive in the competitive society.

我们必须在这个充满竞争的社会保持竞争力。