16. affect vt. 影响
influence vt. 影响
impact vt. 冲击,影响
17. aid v. 援助
assist v. 协助,起助手作用
help v. 帮助
18. aim n. 目的,目标,明确的奋斗目标
goal n. 目标,终点
objective n. 目标,目的
purpose n. 意图,目的
19. allow v. 准许,许可 sb. to do, for
permit v. 允许,准许 sb. to do, doing sth.
20. alter v. 改变 a dress改制衣服
change v. 变化,改变a dress换衣服
convert v. 转变 sb./sth. into
shift vt. 变换;改变,更换,转移
transfer vt. 搬迁,调动;改转
vary vi. 变动,变化
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