药剂师用酒精制作了缬草酊剂来帮助睡眠。

The pharmacist made a valerian ___tincture in alcohol to aid sleep.

她的笑容里带着一丝忧伤。

There was a ___tincture of sadness in her smile.

夕阳为云层染上了一层淡淡的金色。

The sunset ___tinged the clouds with a soft golden hue.