shùn jiān
moment
momentary
in a flash
yī shùn
one instant
very short time
the twinkle of an eye
shùn xī wàn biàn
in an instant a myriad changes (idiom); rapid substantial change
shùn xī
in a flash
twinkling
ephemeral
shùn xī zhī jiān
in the wink of an eye
in a flash
shùn shà
in a blink
in a twinkling