起伏
1.…to go up and down …起伏不定
eg. The strike rate went up and down during the period from 1952 to 1967.
2.There be ups and downs …有起有伏
eg. Between 1972 and 1979, there were several ups and downs in (某方面).
大學院校在線查
高考熱門一鍵查
有疑問就來發(fā)現(xiàn)