1 optimization

2 to optimize

3 to make superior

1 variant: 花 huā

1 to put on makeup

1 cosmetic

2 makeup product

1 chemistry

2 chemical

1 to kill two birds with one stone (idiom)

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

2 to invite disaster by overreaching oneself

1 the full light of day (idiom)

2 fig. peace and prosperity

3 in broad daylight

1 to reach perfection (idiom); a superb artistic achievement