不...而...
gain results though withou ann condition or cause; do... without doing
e.g. 不寒而栗
shiver all over though not cold ——tremble with fear; shuddle
e.g. 不劳而获
reap without sowing; gain without pain
e.g. 不谋而合
agree without prior (or previous) consultation; (of two persons) happen to see eye to eye on sth
e.g. 不期而遇
chance encounter; meet unexpectedly (or by chance)
e.g. 不言而喻
self-evidient
e.g. 不约而同
do or think the same without prior consultation; happen to coincide
e.g. 不翼不飞
(of an object) disappear without trace; vanish into thin air
e.g. 不胫而走
get around fast; spread like wildfire
