These invisible glass creatures aren't aliens on a faraway exoplanet.

这些看不见的玻璃生物并不是遥远系外行星上的外星人。

Sometimes a shadow moved against a dressingroom blind above, gave way to another shadow, an indefinite procession of shadows, who rouged and powdered in an invisible glass.

有时楼上化妆室的遮帘上有一个人影掠过，然后又出现一个人影，络绎不绝的女客对着一面看不见的镜子涂脂抹粉。