They grow around the root cells on the outside.

它们在树根细胞外部周围生长。

" Ecto" means outside, and they don't penetrate the root cells.

“外生”意思是在外面，说明它并不穿透树根细胞。

There are still some reports of some sporadic gun battles, but they say this is just rooting out sleeper cells.

有报道称仍有零星枪战发生，不过他们说这只是在根除潜伏分子。

Jenny Bhatnagar: " Ecto" means outside, and they don't penetrate the root cells.

Jenny Bhatnagar：“Ecto”的意思是外面，它们不会穿透根细胞。

Mycorrhizal fungi encounter the tips of the roots and either surround or penetrate the outer root cells, depending on the type of fungi.

菌根真菌遇到根尖，根据真菌类型的不同，或包围或穿透外根细胞。

So to make the trade, the fungus penetrates into the root cell of the host and forms a tiny structure called an arbuscule, which is Latin for " little tree."

所以为了达成交易，真菌渗透到宿主的根细胞中形成一个叫做丛枝的微小结构，在拉丁语中是“小树”的意思。