fasten on/uponsth
—phrasal verbwithfastenverbuk/ˈfɑː.sən/us/ˈfæs.ən/
to giveattentionto something, because it is ofspecialinterestor often because youthinkit is thecauseof aproblem
集中注意力于；集中思想于
Thepoliticianhasfastenedon theproblemsof theworkingpoor.这位政治人物非常关注从业人员中的穷困人群。
Mymindfastenedon hisadmissionthat he was anagent.我的注意力还集中在他承认自己是间谍的事情上。