tapsthout
—phrasal verbwithtapverbuk/tæp/us/tæp/-pp-
toproducetherhythmof apieceofmusicbyhittingasurfacegently
轻叩…表面发出音乐节拍
Hesatat thedrumsandtappedout thebeat.他坐在鼓边轻轻敲打拍子。
to write something using akeyboard,mobilephone, etc.
敲击键盘（或手机等）写…
Shequicklytappedout amessageon herphone.她很快地在手机上打出一条短信。