IVF clinics can be extremely busy.

IVF的门诊是极其忙碌的。

youdao

A business might not have any customers for days and then suddenly be extremely busy.

一家公司可能好几天没有客户，然后突然十分忙碌。

youdao

It will be very demanding and, on top of the 12-hour time difference between here and there, she is going to be extremely busy.

这项工作将非常具有挑战性，而且她的工作地点和我将有12个小时的时差，她会非常忙碌。

youdao

And WhiteKnightTwo, or "Eve" as this aircraft is known, is going to be kept extremely busy, making for a very efficient operation.

BBC: Science & Environment

He said life in space was extremely busy, with no spare time to be idle.

BBC: Chris Hadfield: 'Space was too good not to share it'