- 重点词汇
- 曲挠
bend; flex; curve; twist; distort
- 橡胶
rubber
- 接头
piecing; joint; contact; connection; jack plug; rendezvous; splice; adapter connector; connect; join; get in touch with; meet; know about; have knowledge of
- 标准
standard; measure; level; template; criterion; scale; norm; mark; benchmark; yardstick; par; canon; plane; pure; normative; textbook; canonical