转瞬即逝

tā de nuò yán shì zhuǎn shùn jí shì de tā shuō huà cóng lái bù suàn huà

他的诺言是转瞬即逝的，他说话从来不算话。

His promises are written in water, and he never keeps his word.

xià rì mù cǎo zhuǎn shùn jí shì de qì wèi

夏日牧草转瞬即逝的气味

the evanescent scents of summer herbs