42.抵制做　 resist doing

41.被迫做　 be forced to do

40.向西迁移　 move westwards

39.从1830年起from about 1830 onwards

38.被除数用制成项链

be used to make necklace

37.长到肩高　 grow to a shoulder-height of

36.大规模存在　 exist in huge numbers

35.通过采集草根生存　 live by gathering roots

34.出售　 go on sale

33.解决问题　 solve the problem