-
So, you're familiar with some of these bacteria like salmonella, or the micro bacterium that causes tuberculosis are shown here.
所以 你们很熟悉像沙门氏菌这样的细菌,或者像这儿的引起结核的小细菌
-
If you're a bacterium your whole life is about swimming to nutrients and running away from things that would kill you.
假如你是一个细菌,你的一生将会在追逐养分,和逃避敌害中度过
-
Movement down a concentration gradient occurs fairly rapidly over short distances like a micron or so, like the size of a bacterium.
顺浓度梯度扩散在一微米左右的短距离内,相当迅速,一微米相当于一个细菌的大小
-
Bacterial cells are small, one to two microns in diameter and this shows a picture of a common bacterium called E. Coli.
细菌细胞很小,直径只有一到两个微米,这张图片是一种常见细菌,大肠杆菌
-
The bacterium doesn't have a nucleus, and in fact, they don't have very well formed organelles in general.
细菌没有细胞核,实际上,细菌没有完善的细胞器
-
It's a common bacterium and most strains of E. Coli are not harmful to people, in fact, they provide us with some beneficial properties.
它是常见菌,且大多数种类的菌株对人类无害,实际上还给了我们颇多裨益
-
It's much larger than a bacterium, it's ten to 30 microns let's say instead of one to two microns, so almost ten times bigger.
人类细胞比细菌大得多,有十到三十微米那么大而不是一两微米,几乎大了十倍
-
This is a bacterium that's normally present in humans; it colonizes all of our intestinal systems.
这种细菌在人体中很常见,栖居在我们所有人的肠道系统中
-
Cells that I took from a human and cells that are in a bacterium.
人类细胞,和细菌细胞
-
Well, you could think about the cell wall of a bacterium as its skeleton, it's what protects it from mechanical forces that are out in the world.
你可能认为细菌的细胞壁,就像骨骼一样,使其免受,外界机械力的伤害
应用推荐