充分必要條件 — chōng fēn bì yào tiáo jiàn

1

chōng¹

to fill, to supply; to be full / to divide, to allocate; fraction; small unit of time or other quantity / surely, certainly; must; will / essential, necessary; to ask for; to coerce; to demand / clause, condition; string, stripe / item, matter; component, part; measure word for events

2

fēn¹

to fill, to supply; to be full / to divide, to allocate; fraction; small unit of time or other quantity / surely, certainly; must; will / essential, necessary; to ask for; to coerce; to demand / clause, condition; string, stripe / item, matter; component, part; measure word for events

3

bì⁴

to fill, to supply; to be full / to divide, to allocate; fraction; small unit of time or other quantity / surely, certainly; must; will / essential, necessary; to ask for; to coerce; to demand / clause, condition; string, stripe / item, matter; component, part; measure word for events

4

yào⁴

to fill, to supply; to be full / to divide, to allocate; fraction; small unit of time or other quantity / surely, certainly; must; will / essential, necessary; to ask for; to coerce; to demand / clause, condition; string, stripe / item, matter; component, part; measure word for events

5

tiáo²

to fill, to supply; to be full / to divide, to allocate; fraction; small unit of time or other quantity / surely, certainly; must; will / essential, necessary; to ask for; to coerce; to demand / clause, condition; string, stripe / item, matter; component, part; measure word for events

6

jiàn⁴

to fill, to supply; to be full / to divide, to allocate; fraction; small unit of time or other quantity / surely, certainly; must; will / essential, necessary; to ask for; to coerce; to demand / clause, condition; string, stripe / item, matter; component, part; measure word for events

As word