- 重点词汇
- 互助
help each other; cooperate; reciprocate; mutual aid; mutual assistance; cooperation; reciprocity; mutual help
- 系统
system; setup; channel; scheme; network; machinery; systematic; systemic
- 开发
develop; tap; build; open up; exploit; pioneer; development; exploitation; developmental
- 邮箱
mailbox; postbox; email box; email address; letterbox; mail drop