Arrector pili muscles produce the effect of goosebumps.

竖产生鸡皮疙瘩的效果。

Here's a hair, here's an arrector pili.

是发，是。

The E. coli have hair-like extensions, called pili, that grab onto the intestinal cells.

大肠杆菌有被称为“菌”的状突起，种突起能够紧紧抓住肠道细胞。

On the capsule, there are pili, which are hair-like extensions that help the bacteria attach to host cells.

荚膜上还有起用的菌。

It has pili and a single polar flagellum, kind of like a tail, at one end which it uses for movement through the gastrointestinal tract.

它含有菌和一条像尾巴的鞭；鞭可以移动，使其能在胃肠道中移动。

It has a bunch of virulence factors such as capsule, LPS, pili, and a siderophore, which helps the bacteria to attack and destroy the host cells and evade the immune system.

它具有多种毒力因子，如荚膜、脂多糖、菌以及铁载体；铁载体帮助细菌攻击宿主，破坏机体细胞，并逃避人体免疫。