1 flavor

2 smell

3 hint of

1 (numerical, statistical) index

2 (math.) exponent

3 index

4 exponential (function, growth)

1 to know

2 to become aware of

3 also pr. [zhī dao]

1 don't tell me ...

2 could it be that...?

1 the ways of the world

2 the morals of the time

1 lit. when a man achieves the Dao, his poultry and dogs rise to Heaven (idiom)

2 fig. to ride on sb else's success

3 Once one man gets a government position, all his cronies get in too

4 Once sb has cracked the problem, every Tom, Dick and Harry can do it

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

2 in the twinkling of an eye

1 one word says it all (idiom)

2 to hit the nail on the head

3 to be pithy and correct

1 no use to tell others

2 let's keep this between ourselves (idiom)

1 to know sth like the back of one's hand (idiom)

2 to know (a person, a place etc) inside out