The reason is a microscopic organism called Toxoplasma gondii.

原因在于一种叫做刚地弓形虫微生物。

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

事实上，这是自然界中最稳固弓形之一，如今我们仍然常常用到。

Wolves infected with toxoplasma are more likely to wander away from their former pack to find a new one and are more risk-taking, more bold.

感染弓形虫狼更有可能离开原来狼群去寻找新狼群，而且更冒险，更大胆。

For example, mice infected with Toxoplasma were quicker to check out the far reaches of an elevated maze than their uninfected comrades.

例如，相比未感染老鼠，感染弓形虫老鼠会更快地检高处迷宫。

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

露脊鲸有圆形身体，弓形吻部，V 形喷气孔和深灰色或黑色皮。

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

类似过程发生在猫消化系统中繁殖弓形虫和老鼠身上。

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

绝对是有益于弓形虫，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，弓形虫普遍性较低，因此我们认没有必要进检测。

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

感染弓形虫病啮齿动物实际上会被猫尿所吸引。

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

这是因一些猫携带一种叫做弓形虫寄生虫，它可能会导致胎儿畸形。

In other countries, like in Europe, specifically France, there can be a higher level of exposure to toxoplasmosis because of undercooked meats and cheeses and things that may expose patients to parasites.

在其他国家，比如欧洲，特别是法国，由于未煮熟肉类、奶酪等食物，弓形虫暴露风险可能更高。

Infected rodents are more reckless and have slower reaction times.

感染了弓形虫啮齿动物会变得更加鲁莽，反应时间也会变慢。

She came across a familiar looking floor plan in a book about the bow house.

她在一本关于弓形屋书中发现了一个看起来很熟悉平面图。

So I wanted to make a bowed lyre with a deeper sound.

所以我想制作一把音色更深弓形里拉琴。

Selecting from the few queer houses upon Mill Pond Bank a house with a wooden front and three stories of bow-window (not bay-window, which is another thing), I looked at the plate upon the door, and read there, Mrs. Whimple.

我从 Mill Pond Bank 上几栋古怪房子中挑选了一栋木头正面和三层楼弓形窗（不是凸窗，这是另一回事）房子，我看着门上牌子，在那里读到，夫人。鞭策。

The next morning when I awoke and looked out of the bow window of the big old-fashioned bedroom, I saw under a gray sky a country that was still all mystery.

第二天早上，当我醒来，从那间老式大卧室弓形窗外望去，我看到在灰色天空下，一个仍然充满神秘色彩国家。

We now slowly ascended a drive, and came upon the long front of a house: candlelight gleamed from one curtained bow-window; all the rest were dark.

我们缓缓地驶上车道，来到宅子正面。烛光从一扇拉上窗帘弓形窗里透出来，其余窗口都是黑洞洞。

On such evenings Margaret was apt to stop talking rather abruptly, and listen to the drip-drip of the rain upon the leads of the little bow-window.

在这样晚上，玛格丽特很容易突然停止说话，倾听雨滴打在小弓形窗引线上声音。

Diffuse gas in the two galactic haloes would compress on collision, forming a curved structure like the bow wave from a ship moving through water.

两个星系晕中弥散气体在碰撞时会压缩，形成类似船只在水中移动时产生弓形波弯曲结构。

If you are a rat and you have toxoplasmosis, you are perfectly healthy except for one thing.

如果你是只患有弓形虫病老鼠，除了一件事外， 你是健康。