busy

adj.

忙碌的；熙来攘往的；占线的；全神贯注的；杂乱的

比较级： busier 高水平： busiest

例句

The principal is a very busy woman.

校长是个大忙人。

I'll be too busy to come to the meeting.

我会很忙，不能到会。

the busy signal

忙音

Since she retired she's kept herself very busy.

自从退休后，她一直没闲着。