- 1. have a thorough knowledge of; be well versed in
- ♦ ~中西医学 have a thorough knowledge of both Western and traditional Chinese medicine
- 2. link up; thread together
- ♦ 大运河~五大河流。 The Grand Canal links up five big rivers.
- ♦ 这条铁路已全线~。 The whole railway line has been linked up.