If the caller has to listen to a recording before speaking to the reservation agent, this should not last more than 20 seconds.

如果来电者在与预定部通话前须听等候音乐，不应该持续超过20秒。

youdao

If the caller has to listen to a recording before speaking to the reservation agent, this should not last more than 20 seconds.

如果来电者在与预定部通话前须听等候音乐，不应该持续超过20秒。

youdao