521. 擦脸上的汗 sweat off one’s face
522. 坐下吃饭 sit down to table
523. 纳税 pay one’s taxes
524. 沏茶 make tea
525. 用望远镜 through a telescope
526. 讲故事 tell a story
527. 辨别，分清 tell one from the other
528. 量体温 take one’s temperature
529. 数以万计 tens of thousands of
530. 被…吓了一跳 be terrified at
531. 因某事感谢某人 be thankful to sb. for sth.
532. 扔掉 throw away
533. 吐出(食物)，呕吐 throw up
534. 立刻，很快 in no time
535. 交通堵塞 traffic jam
536. 跟某人开玩笑，欺骗某人 play a trick on sb.
537. 处于困境(苦恼)中 be in trouble
538. 一条裤子 a pair of trousers
539. 上大学 attend university
540. 拜访某人 pay a visit to sb.
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