- 重点词汇
- 清扫
clean; sweep; clear away; clean up; sweep up; sweeping; clean-up
- 工具
tool; instrument; means; device; implement; medium; vehicle; weapon; utility
- 开发
develop; tap; build; open up; exploit; pioneer; development; exploitation; developmental
- 电话
telephone; phone; the telephone; telephony; communication; telephone system; blower; buzz