纳米管是一种比较长比较薄的亚显微管，主要成分是碳。

Nanotubes are long, thin, sub-microscopic tubes made of carbon.

youdao

纳米管是一种比较长比较薄的亚显微管，主要成分是碳。

Nanotubes are long, thin, sub-microscopic tubes made of carbon.

youdao