凄然

qī rán yī xiào

凄然一笑

force a sad smile

qī rán lèi xià

凄然泪下

shed tears in sadness

qiū yǔ yě bù jìn shì qī rán hé cǎn dàn tā yě yǒu rùn wù wú shēng hé dí dàng chén āi de gōng yòng

秋雨也不尽是凄然和惨淡，她也有润物无声和涤荡尘埃的功用。

The autumn is not all sad and gloomy, she is also silent lubricant and wash away the dust of the function.