讲解文本：
play it by ear 见机行事，随机应变 Let's play it by ear when we get there. 到了那儿，我们再见机行事。 We should have a plan for tomorrow, or we will have to play it by ear. 我们应该准备一个计划，不然只能走一步算一步了。
疯狂练习吧！
