Optical fiber is a glass waveguide which is normally as thin as human hair.
光纤是一种玻璃波导，通常和人的头发一样细。
The thin, human evil, rain sent flowers to drop at dusk.
世情薄，人情恶，雨送黄昏花易落。
It's very very thin, say, probably about a size of a hair, okay, a human hair.
它非常薄，大概和头发差不多大小，人的头发。
Layers of fog cover the human eye, a thin transparent time.
迷雾层层遮人眼，一张薄纸通透时。
Layers of fog cover the human eye, a thin transparent time.
迷雾层层遮人眼，一张薄纸通透时。
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