We plan to expand our business activities in East Africa.
我们打算在东非扩展我们的商业活动。
The volcano is in activity.
这火山正活跃著。
There was a sudden spurt of activity in the housing market.
房产市场突然活跃了一阵子。
用作及物动词(vt.)
Busking is a fun activity for the performer.
街头表演对于街头艺人来说是一项有乐趣的活动。
Interactive music-making frequently blurs the conventional distinction between compositional and improvisational activity.
交互音乐的创作过程经常会模糊传统意义上的作曲与即兴表演这两种行为之间的界限。