When the researchers looked at the seedling tissues under an electron microscope, however, they could see the nanotubes had actually entered living cells.

然而，当研究者在电子显微镜下观察种子组织的时候，他们能够看到纳米管确实已经进入了活细胞。

The solution: carbon nanotubes.

而碳纳米管是唯一的解决办法。

But the nanotubes are modern.

但纳米管是很现代的。

His group has worked out how to make nanotubes into thin films.

他的团队已经解答了如何把纳米管制成薄膜的问题。

Nanotubes have also been used in all kinds of bio-sensing.

Li说：“纳米管已经被用于各种生物传感器中。”