as and when
1
根据需要, 在必要时
used to express the idea of something happening or being done at the appropriate or necessary times
- We will hire new employees as and when the need arises.
我们将在需要时适时雇佣新员工。
- The system automatically updates itself as and when new information becomes available.
系统一旦有新信息可用，就会自动更新。
- The company will expand its operations as and when market conditions improve.
公司将在市场条件改善时扩大业务。