1 to bounce

2 to bounce back

3 to boomerang

4 to ricochet

5 rebound (of stock market etc)

6 bounce

7 backlash

8 negative repercussions

1 bullet

2 classifier: 粒 lì

3 classifier: 颗 kē

4 classifier: 发 fā

1 crossball

2 bullet

3 shot

4 shell

5 ball

1 elasticity

2 elastic force

3 spring

4 rebound

5 bounce

1 flexibility

2 elasticity

1 a snap of the fingers (idiom); in a flash

2 in the twinkling of an eye

1 one can't function properly on an empty stomach (idiom)

2 an empty sack cannot stand upright

1 lit. to play the lute to a cow (idiom)

2 fig. offering a treat to an unappreciative audience

3 to cast pearls before swine

4 caviar to the general

5 to preach to deaf ears

6 to talk over sb's head

1 lit. to flick dust off sb's cap (idiom); to celebrate an official appointment

2 to congratulate and celebrate (promotion, graduation etc)

1 in a flash (idiom)