- 重点词汇
- 开发
develop; tap; build; open up; exploit; pioneer; development; exploitation; developmental
- 一套
set; block; package; bag; bundle; nest; suite; battery
- 系统
system; setup; channel; scheme; network; machinery; systematic; systemic
- 多少钱
how much
- 电话
telephone; phone; the telephone; telephony; communication; telephone system; blower; buzz