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。
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。
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。
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。
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？
Squid beaks are often found in the stomachs of sperm whales.
经常能在抹香鲸的胃里发现鱿鱼的嘴。
Ambergris is the concretion in the intestine of the sperm - whale.
龙涎香是抹香鲸肠内的结石。
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。
Comet assay and sperm chromatin structure assay showed no significant change.
彗星实验和染色质结构分析则无明显变化。
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。
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。
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。
You know, it is completely dark at the bottom of the ocean, therefore the sperm whale has to look for the squid by using sound waves.
你知道，在海洋底部一片漆黑，因此抹香鲸必须利用声波才能找到枪乌鱼。
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。
By studying one (Anopheles gambiae) of the 40 mosquito species that spread the disease in nature, researchers created 100 male mosquitoes without sperm.
自然界有40种蚊子可以传播疟疾，通过对其中一种(Anophelesgambiae，冈比亚疟蚊)进行研究，研究人员们创造了100只雄性不育蚊子。
Because children born from donor sperm or eggs in the UK can now trace their biological parents when they turn 18, potential donors have been deterred, it is claimed.
由于如今的英国，捐精或捐卵人工繁育的后代在年满18岁后可以查询到自己的生物学父母，很多潜在捐精者对捐精踌躇不前。
The website lists a range of "sample profiles" of typical sperm donors, including an Oscar-winning actor, a member of the House of Lords and an ex-Premiership footballer.
网站列出了一些典型捐精者的的“简况示例”，包括一位奥斯卡获奖演员、一位上议院议员和一位前英超球员的个人简介。
The largest toothed whales on Earth, sperm whales are listed as vulnerable-or facing a high risk of extinction in the wild-by the International Union for Conservation of Nature.
作为地球上最大型的齿鲸类，抹香鲸已经被国际自然保护联盟列入了高灭绝风险的野外物种之列。
Fueling the evolution of cetacean communication is an ability, observed in dolphins, humpback whales and sperm whales, to pass songs and codas between generations and individuals.
通过观察海豚、驼背鲸和抹香鲸得知，促进鲸目动物通信进化的是一种在每代以及每个个体间传递鸣叫和强音的能力。
Fueling the evolution of cetacean communication is an ability, observed in dolphins, humpback whales and sperm whales, to pass songs and codas between generations and individuals.
通过观察海豚、驼背鲸和抹香鲸得知，促进鲸目动物通信进化的是一种在每代以及每个个体间传递鸣叫和强音的能力。
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