The problem had been alluded to briefly in earlier discussions.
这个问题在以往的讨论中已经间接提及。
He glanced briefly towards her but there was no sign of recognition.
他瞥了她一眼，但似乎没认出她来。
She looked up briefly then returned to her sewing.
她抬头看了一眼，又接着做她的针线活儿。
He glanced briefly down the list of names.
他草草看了一遍名单。
There are four basic alternatives; they are described briefly below.
有4个基本的选项，简述如下。