on command

US

UK

B2 中高級
phr.片語一聲令下
The dog sits on command.
adj.形容詞隨時待命
She has the ability to cry on command.

影片字幕

如何教老狗學新花樣 (How to Teach an Old Dog New Tricks)

01:33如何教老狗學新花樣 (How to Teach an Old Dog New Tricks)