The meetings will be held on an ad hoc basis.

会议将根据需要随时举行。

《牛津词典》

"I would accept opportunities in TV on an ad hoc basis," he said.

“在特别需要时我会接受在电视上露面的机会，”他说道。

《柯林斯英汉双解大词典》

The Council meets on an AD hoc basis to discuss problems.

议会临时安排会议讨论问题。

youdao

The Council meets on an AD hoc basis to discuss problems.

议会临时安排会议讨论问题。

youdao