615. try doing 试着做
614. trek through 在.....中穿过
613. too much 太多(+n.)
612. to the south of.. ..的南面(外阁)
611. to be sure 诚然,的确
610. to one’s surprise 令人惊呀的是
609. this way 这种方法,这条路;请走这边
608. think of 就…思考,考虑…., 认为
607. think over 仔细考虑
606. think about 考虑