重点讲解：
1. at times 有时；间或；
The debate was highly emotional at times.
辩论有时变得异常情绪化_#j0!Hi|^|。
2. at the request of 应邀；应…的请求；按照…的要求；
The evacuation is being organised at the request of the United Nations Secretary General.
根据联合国秘书长的要求，正在组织撤退gJmKmuy[#PWeD^!@.BY。

关注微信公众号【可可双语精读】，获取更多详细优质讲解内容uHlEp#WlOT。