It was to train her to use her diaphragm in singing and to strengthen her lungs.

这可以训练她在唱歌的时候运用横膈膜，同时也增强肺部功能。

youdao

They were singing when the train entered into the station.

当火车进站的时候，他们在唱歌。

youdao

He was singing when the train entered into the station.

当火车进站的时候，他们在唱歌。

youdao

He was singing when the train entered into the station.

当火车进站的时候，他们在唱歌。

youdao