And then arches are actually very rare.

而弓形其实非常罕见。

Most people have probably heard of Toxoplasma gondii, the parasitic protozoan that causes toxoplasmosis.

大多数人可能都听说过刚地弓形虫，生性原生动物会引起弓形虫病。

Toxoplasmosis isn't only found in the cat litter.

弓形虫不仅仅存在于猫砂中。

The reason is a microscopic organism called Toxoplasma gondii.

原因在于一叫做刚地弓形虫的微生物。

" The story about Toxoplasma gondii manipulating the behavior of its host is simply fascinating."

“弓形虫操纵宿主行为的故事简直令人着迷。”

Not so when researchers recently injected mice with Toxoplasma gondii.

研究人最近给小白鼠注射弓形虫却没符合惯例。

But there is a microorganism called Toxoplasma that needs both cats and rodents to complete its life cycle.

有一生虫叫弓形虫牠需要猫和老鼠来繁殖。

That's because some cats carry a parasite called toxoplasmosis and it can cause birth defects.

是因为一些猫携带一叫做弓形虫的生虫，它可能会导致胎儿畸形。

And the hoops were made by soldiers, who turned over and stood on their hands and feet.

弓形小球门由士兵组，转过身去，红鹤腿着地站着。

In fact it's one of the most stable arches in nature, so sound that we still use it today.

事实上，是自然界中最稳固的弓形之一，如今我仍然常常用到。

Rodents that get infected with toxoplasmosis actually makes these rodents attracted to cat urine.

感染弓形虫病的啮齿动物实际上会被猫尿所吸引。

Right whales have round bodies with arching rostrums, V-shaped blowholes and dark grey or black skin.

露脊鲸有圆形的身体，弓形的吻部，V 形的喷气孔和深灰色或黑色的皮肤。

A similar process happens with toxoplasma and mice which breeds in the digestive system of cats.

类似的过程发生在猫的消化系统中繁殖的弓形虫和老鼠身上。

Definitely behaviour that is beneficial to toxoplasma, but absolutely not for the rodent.

绝对是有益于弓形虫的行为，但绝对不是啮齿动物。

In the United States, it's less ubiquitous and we don't find that there's a need to test for it.

在美国，弓形虫的普遍性较低，因此我认为没有必要进行检测。

Billy advanced and drew away the drapery which screened the alcove of the bow window.

比利上前拉开遮住弓形窗壁龛的窗帘。

Toxoplasma also nestles into our brains and meddles with our behavior behind the scenes.

弓形虫还潜入我的大脑并在幕后干预我的行为。

These creatures had grasping hands, arched backs, and thick muscular tails.

些生物有紧握的手、弓形的背部和粗壮的肌肉尾巴。

There's a parasite known as toxoplasmosis that lives in the bodies of rats.

有一生虫叫做弓形虫， 它生在老鼠的身体里。

It was below the boudoir, and had also a bow-window looking out on the avenue.

它在闺房下面， 还有一个弓形窗， 可以看到外面的大街。