If you need any help, just sing out.如果你需要任何帮助，就大声说出来。

The children sang out [=cried out] “good morning” to the teacher.孩子们对老师大声喊道：“早上好！”

The crowd sang out insults.这群人大声叫骂。

The singer stopped and the crowd sang out the rest of the chorus.歌手停了下来，人们大声唱余下的副歌部分。