两天后他们把受精卵移植回我的体内。
Two days later, they implanted the fertilized eggs back inside me.
即使鳄鱼成功地从卵中孵化出来，问题也不会结束。
The problems do not end if crocodiles successfully hatch from the eggs.
项目通常首先从确定一条让鲑鱼产过卵的河流开始。
Projects usually begin by identifying a stream that once allowed salmon to spawn.
酚类物质还会使卵变小，这会减少第二年毛虫的生长。
Phenols also make the eggs smaller, which reduces the growth of the following year's caterpillars.
在未受精卵中，这些物质是不活跃的，而且分布不均匀。
In the unfertilized egg, the substances are inactive and are not distributed homogeneously.
外层几乎是密封的，可以保护脆弱的蜂卵，以及后来的幼虫。
The casing is nearly airtight, which helps protect the vulnerable egg and later larva.
在锥实螺的例子中，研究表明右旋基因是在卵的形成期表达的。
In the case of Lymnaea peregra, studies indicate that a dextral gene is expressed during egg formation.
在滞育期间，小袋鼠呆在雌袋鼠的育儿袋里，因而推迟了子宫内第二个受精卵的发育。
During diapause, a young kangaroo stays in the female's pouch and growth of a second fertilized egg inside the uterus is delayed.
比如，普通的苍蝇通过产下几千颗卵来繁殖后代，这样每只苍蝇的基因就被复制了上千遍。
For example, the common housefly reproduces by laying several thousand eggs, so each fly gene gets copied thousands of times.
然而，到了第12天，当它们长到3厘米长时，就会有成百上千微小的卵在雌蛙的身体下部形成。
By the twelfth day, however, when they are about 3 centimetre long, hundreds of tiny eggs form on the underbodies of the females.
与水生和海洋生物不同，陆生植物不能总是依靠水流来携带它们的生殖细胞和分散它们的受精卵。
Unlike aquatic and marine forms, land plants cannot always rely on water currents to carry their sex cells and disperse their fertilized eggs.
煎蛋水母，也被称为美杜莎水母，它的卵在海水中受精，然后发育成固定在海床有机体上的微小幼虫。
The fried egg jellyfish, also known as medusa, produce eggs that are fertilized in sea water, which then develop into a tiny larva fixed to sea bed organisms.
在许多动物中，以及在诸如果蝇卵的孵化乃至松鼠跑动的转轮这样的生物活动中，这种变化趋势一直受到广泛的研究。
This drift has been studied extensively in many animals and in biological activities ranging from the hatching of fruit fly eggs to wheel running by squirrels.
在这种蝴蝶卵上，花边图案标记精子进入的卵孔。
On this butterfly egg, the lacy pattern marks the micropyle, where sperm enters.
如果第二年有足够的雨水形成另一个湖泊，卵就会孵化，小虾会再次快速地经历生长、成年、产卵和死亡的循环。
If sufficient rain falls the next year to form another lake, the eggs hatch, and once again the shrimps pass rapidly through their cycle of growth, adulthood, egg-laying, and death.
他们好奇为什么许多同卵双胞胎即使不住在一起也会做出相似的选择。
They want to know why many identical twins make similar choices even when they don't live near each other.
非同卵双生胎是两个受精卵同时在子宫着床的结果。
Non-identical twins are the result of two fertilized eggs implanting in the uterus at the same time.
例如，吉姆·施普林格和吉姆·路易斯是同卵双胞胎。
For example, Jim Springer and Jim Louis are identical twins.
在这些物种中，受精卵发育为雌性，未受精卵发育为雄性。
In these species, fertilized eggs develop into females and unfertilized eggs into males.
明尼苏达大学的研究人员研究了350组没有一起长大的同卵双胞胎。
Researchers at the University of Minnesota, studied 350 sets of identical twins who did not grow up together.
由于同卵双胞胎来自于一个分裂成两个的受精卵，他们实际上共享相同的遗传密码。
Because identical twins come from a single fertilized egg that splits into two, they share virtually the same genetic code.
他们研究了像吉姆·施普林格和吉姆·路易斯一样在不同环境中长大的同卵双胞胎。
They study pairs of identical twins who grew up in different surroundings, like Jim Springer and Jim Louis.
如果同卵双胞胎彼此在疾病方面比异卵双胞胎更相似，那么这种疾病的易感性至少在一定程度上是由遗传造成的。
If identical twins are more similar to each other with respect to an ailment than fraternal twins are, then vulnerability to the disease must be rooted at least in part in heredity.
一只章鱼每次会产下5万到20万个卵。
在美国，一种叫做滴滴涕的杀虫剂正在伤害隼卵。
In America, a pesticide, a chemical, called DDT was harming the falcon eggs.
她根据卵的大小、形状和存活的可能性将它们分成若干组。
She separates the eggs into groups based on their size, shape and possibility of survival.
许多种类的鱼可以根据它们的群体、它们的亲戚，甚至它们自己的卵来区分彼此。
Many kinds of fish can tell one from another, according to their group, their relatives, and even their own eggs.
但在20世纪80年代，对出生时被分开而成年后重新团聚的同卵双胞胎进行研究时，双胞胎研究出现了令人惊讶的转折。
But twin studies took a surprising twist in the 1980s, with the arrival of studies into identical twins who had been separated at birth and reunited as adults.
许多科学家曾经认为，同卵双胞胎在外貌上的相似是由基因决定的，而他们之间的性格、智力和其他差异则是受到环境的影响。
Many scientists once believed that physical similarities between identical twins are genetic, while their personalities, intelligence and other differences between them are an effect of their environment.
许多科学家曾经认为，同卵双胞胎在外貌上的相似是由基因决定的，而他们之间的性格、智力和其他差异则是受到环境的影响。
Many scientists once believed that physical similarities between identical twins are genetic, while their personalities, intelligence and other differences between them are an effect of their environment.
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