His first act as leader was to purge the party of extremists.

他当上领导的第一件事就是清除党内的极端分子。

《牛津词典》

The first is that the Cache implements a least-recently-used algorithm, allowing ASP.NET to force a Cache purge—automatically removing unused items from the Cache—if memory is running low.

首先，缓存会实现最近最少使用的算法，使得 ASP.NET 能够在内存运行效率较低的情况下强制缓存清除——从缓存自动删除未使用过的项目。

youdao

The first step is to do the cleaning work of the sealing ring, the owner can one or two quarters at a purge of the sealing ring.

第一步就是要做好密封圈的清洗工作，车主可以每隔一两个季度对密封圈进行一次清洗。

youdao

NATO's aircraft revved up their engines, the Yugoslav leader's first moves were to complete a purge of the security forces, and silence the voices of domestic opposition.

ECONOMIST: The West versus Serbia

Nor did the private schools purge themselves of the most difficult pupils at the end of the first year.

ECONOMIST: Lessons Cleveland can teach

The force has gone through a deep purge, with a tenth of its officers sacked in the first eight months of this year for corruption or incompetence.

ECONOMIST: Organised crime in Mexico