24. stay/be away for a month 离开一个月

23. a thirteen-year-old girl 十三岁小姑娘 a girl of thirteen years old; a girl of thirteen years of age; a girl aged thirteen

22. pass the exam 考试及格 fail (in) the exam 考试不及格

NOT ONE LESS

21. can’t help doing sth 情不自禁， 忍不住做某事 　　can’t help do sth 不能帮忙做某事

20. owe sth to sb. = owe sb sth 把…归功于；感谢；欠(债)

WORD STUDY & GRAMMAR

19. meat-eating dinosaurs 食肉恐龙

19. in the end 最后；终于 at the end of在…末尾／尽头 by the end of 到…末为止

18. go wrong 出错；出故障；走错道 do a little wrong

17. do research (in/into...) 搞研究

16. cut／tear…into pieces 把…切／撕成碎片 cut/tear ... into halves 把...切/撕成两半