1 top quality

2 front ranking

1 to exchange

2 exchange

3 communication

4 interaction

5 to have social contact (with sb)

1 precious stone

2 gem

3 classifier: 枚 méi

4 classifier: 颗 kē

1 pillow

1 to flow

2 to disseminate

3 to circulate or spread

4 to move or drift

5 to degenerate

6 to banish or send into exile

7 stream of water or sth resembling one

8 class, rate or grade

1 to kill two birds with one stone (idiom)

1 man seeks his way up just as water seeks its way down (idiom)

2 one should constantly strive to make progress

1 lit. the other mountain's stone can polish jade (idiom); to improve oneself by accepting criticism from outside

2 to borrow talent from abroad to develop the nation effectively

1 to commit to the waters (idiom); to lose sth irrevocably

1 lit. to strike a stone with egg (idiom); to attempt the impossible

2 to invite disaster by overreaching oneself