It only takes one sperm to fertilize an egg.

只需一个精子就可以使卵受精。

Conception occurs when a single sperm fuses with an egg.

当一个精子和一个卵子结合时受孕就发生了。

Each male ejaculation will contain up to 300 million sperm.

男性每次射精的精液含多达三亿个精子。

The sperm fuses with the egg to begin the process of fertilization.

精子与卵子结合开始受精过程。

The sperm sample is checked under the microscope before insemination is carried out.

进行受精前用显微镜检查精子样本。

A female stores sperm and can determine the sex of each egg she lays by fertilizing it or leaving it unfertilized.

雌性储存精子，可以通过受精或不受精来决定每一个卵细胞的性别。

Sperm whales are emperors of the ocean.

抹香鲸是海洋之王。

Let's think about what we can do to save sperm whales.

想想为了拯救抹香鲸，我们能做些什么？

On this butterfly egg, the lacy pattern marks the micropyle, where sperm enters.

在这种蝴蝶卵上，花边图案标记精子进入的卵孔。

For a long time, we assumed that all whales that had teeth including sperm whales and killer whales were closely related to one another.

在很长一段时间里，我们认为所有有牙齿的鲸鱼，包括抹香鲸和虎鲸，彼此都是密切相关的。

Production of testicular output sperm and spermatic fluid is also larger in polygamous animals.

在一夫多妻的动物中，睾丸输出的精子和精浆的量也较大。

The objective is to evaluate the role of sperm kinematic parameters in the hyperactivation of Guinea pig spermatozoa.

目的是评估精子运动学参数在豚鼠精子过度激活中的作用。

Do you know how the sperm whale manages to do this?

你知道抹香鲸怎样设法做到这个的吗？

Sperm whales and giant squid may be mortal enemies.

抹香鲸和巨型章鱼可能是死敌。

It takes about 175, 000 sperm cells to weigh as much as a single egg cell.

一个卵细胞的重量相当于约175 000个精细胞的重量。

They compared sperm from a fruit fly, sea urchin, rooster, fish and human.

他们比较了果蝇、海胆、公鸡、鱼类和人类的基因。

You generally have to be white, as most sperm recipients are white couples.

通常你得是白人，因为大多数接受人都是白人。

When a sperm whale is sick, it many produce a fatty substance called ambergris.

当抹香鲸生病时，它会产生出一种脂肪物质，被称为龙涎香。

Sperm whales are often spotted in groups (called pods) of some 15 to 20 animals.

抹香鲸通常被发现成群出现，每群大约有15至20条。

Britain also faces a shortage of sperm donors, but the issue there is not compensation.

英国也面临着捐精荒，但那儿的问题不是补偿的事。

Sperm whales, which spend more time than other species at the surface, were also vulnerable.

抹香鲸待在水面上的时间比其他种类的鲸鱼都要长，所以也很容易被晒伤。

To snack on octopus and giant squid, sperm whales sometimes dive over 2,000 meters in the sea.

为了猎食章鱼及大型乌贼，抹香鲸有时会潜到2,000多公尺深的海中。

Sperm whale poop helps fertilize algae, which in turn suck up carbon dioxide via photosynthesis.

抹香鲸向藻类施肥，反过来，又通过光合作用吸收二氧化碳。

A study in 2006 found older men are more likely to father dwarves, due to an age-related genetic mutation in their sperm.

2006年的一项研究发现大龄男士生养侏儒子女的机率更大，这是由他们与年龄相关的基因突变造成的。

That in turn stands to have an effect on the food chain, since giant squid provide the meal of choice for endangered sperm whales.

其后果又对食物链产生影响，因为巨型鱿鱼是濒危抹香鲸的首选食物。

But previous sightings and sound recordings closer to the surface suggested that the sperm whales are relatively few and far between.

但是之前位于水面附近的目击和录音都说明抹香鲸在那儿相对稀少。

The scientists also found that darker whales, in this case sperm and fin whales, tended to not get sunburned as much as lighter blue whales.

科学家还发现深颜色的鲸鱼，比如长须鲸和抹香鲸，不会像浅蓝色的鲸鱼那样遭受同等程度的灼伤。