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1. 简洁地，简短地；简单地说
   Briefly, I think we should accept their offer.

   简言之，我认为我们应该接受他们的提议。

   He told me briefly what had happened.

   他把发生的事简略地对我说了一遍。

2. 短时间地，短暂地
   The President stopped off briefly in London on his way to Geneva.

   总统去日内瓦途中曾在伦敦作短暂停留。