lusterless eyes的用法和樣例：
例句
- I hadn't seen children with distended bellies and lacklustre eyes.
我沒有見到肚子鼓起，兩眼無神的孩子。 - He heard footsteps and dropped the paper back in the corner and stood just as he had before, his back against the wall, his eyes vacant and sleepy.
他聽見了腳步聲，就把報紙扔回到角落裡，跟早先一模一樣站著，背靠著牆，兩眼無神，充滿睡意。
