●ˈfasten on/onto sth ( ˈfasten upon sthmore formal) 1.to hold sth firmly握住;抓紧◆The cheetah’s jaw fastened on the gazelle’s throat. 猎豹死死咬住羚羊的喉咙。2.to choose sth and give it all your attention or interest把(注意力或兴趣)集中于;对…锲而不舍◆When she fastens on an idea, there’s no stopping her. 她一旦打定主意,什么也不能阻止她。OBJidea, word, fact[v + prep]