He is rather short and skinny, has a thin moustache and even thinner hair on his head.

他很矮，并且皮包骨头，有稀疏的小胡子和甚至更稀疏的头发。

youdao

The end result? Smokers have thinner hair that tends to go gray sooner than nonsmokers.

还没完呢。吸烟不仅会让你头发稀少，吸烟的人比起不吸烟的人头发灰得比较快。

youdao

The painful truth is most guys have noticeably thinner hair by age 35 and significant hair loss by age 50.

男人到了35岁就会发现自己的头发变得越来越稀薄，到了50岁，头发就几乎快掉光了，这是一个多么令人痛苦的事实。

youdao

The basis for CFRP construction is provided by fine carbon fibres, ten times thinner than a human hair.

ENGADGET: Visualized: Mercedes-Benz SLS AMG E-Cell bares all

The total thickness of a completely plastic solar cell is in the range of one micrometer, which is 100 times thinner than a human hair.

FORBES: New Technique Creates First Plastic Solar Cell

The effect, which occurs thanks to a conducting fluid in which the yarns were dipped, could be put to use in motors much thinner than a human hair.

BBC: Nanotube yarns twist like muscles