He is practicing playing the piano in the next room.

他正在隔壁房间练习钢琴。

youdao

I heard her practicing singing in the next room.

我回房间时听见她在隔壁房间练歌。

youdao

I heard her practicing singing in the next room.

我回房间时听见她在隔壁房间练歌。

youdao