grasp at any straw 基本例句 捞救命稻草 He acted like a drowning man trying to catch at a straw.他那样做好像一个快要淹死的人拼命想捞救命稻草一样。 You're grasping at straws if you think you can pass that exam by starting to study the night before!要是你认为在考试前一天的晚上开始念书就能通过考试的话，那你就是想捞救命稻草。