The sex of the embryo is predetermined at fertilization.
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2. 胚胎研究是个让人情绪激动的问题。
Embryo research is an emotive issue.
《柯林斯英汉双解大词典》
3. 许多人反对用胚胎做实验。
Many people object to experimentation on embryos.
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4. 全国各地的诊所里有24000个冷冻胚胎。
There are 24,000 frozen embryos in clinics across the country.
《柯林斯英汉双解大词典》
5. 这篇论文对如何通过克隆制造人类胚胎提供详细的描述。
The paper provides a detailed description of how to create human embryos by cloning.
《柯林斯英汉双解大词典》
6. 例如，蛇的胚胎会生长出后肢。
Snake embryos, for example, sprout hind limb buds.
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7. 这关系到胚胎在哪个平面被切割。
It matters in which plane the embryo is cut.
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8. 蝾螈胚胎却会吸引藻类进入组织和细胞。
A salamander embryo can attract algae inside its tissues and cells.
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9. 哪些胚胎细胞是确定的？
Which embryo cells are determined?
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10. 他从胚胎的耳朵部分中，取出一个泡囊移植到腕部。
Who took a ball, the vesicle, and he transplanted from the embryo, the ear region, to a limb.
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11. 更奇怪的是，一个从分裂胚胎中受孕的妇女可以生下自己的双胞胎。
Even more bizarre, a woman conceived from a split embryo could give birth to her own twin.
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12. 和我们之前谈到的胚胎干细胞有所不同，这是一个成人干细胞的例子。
Different from the embryonic stem cell we talked about before, it's an example of an adult stem cell.
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13. 例如，父母可以将一个胚胎植入母亲的子宫，无限期地储存同卵双胞胎。
For example, parents could have one embryo implanted in the mother's womb and store its identical siblings indefinitely.
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14. 胚胎干细胞如此让人激动是因为它的天然功能就是分化成身体所有的细胞。
Why people are so excited about embryonic stem cells is because in nature they become all the cells of the body.
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15. 如果在一个不同于早期研究人员所使用的平面上切割，就不会形成两个完整的胚胎。
If it is cut in a plane different from the one used by the early investigators, it will not form two whole embryos.
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16. 暂停胚胎的发育比与其兄弟姐妹竞争更有利于使它做好准备以避免艰难时期的到来。
The pause of the development of an embryo has more benefits for preparing it to avoid the harsh times than for competing with its siblings.
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17. 这使她能够在干旱和食物短缺时暂缓胚胎的发育，直到育儿袋里的后代能够独立生活。
This allows her to freeze the development of an embryo during times of drought and food shortage until the offspring in the pouch is able to leave.
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18. 这使他们相信早期胚胎中的细胞是不确定的，因为每个细胞都有可能以各种不同的方式发育。
This led them to believe that the cells in the early embryo are undetermined in the sense that each cell has the potential to develop in a variety of different ways.
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19. 由此产生的杂交后代长成了一个名为胚泡的小胚胎，被植入代孕母亲的子宫，然后变成了多莉。
The resulting hybrid grew into a tiny embryo known as a blastocyst, implanted into the womb of a surrogate mother, and went on to become Dolly.
Among other benefits, this allows her to freeze the development of an embryo during times of drought and food shortage until the offspring in the pouch is able to leave.
Studying the fruit fly, a household nuisance but a time-honored experimental subject, has enabled the secrets of how embryos develop to begin to be unraveled by scientists.
Other epigenetic processes appear to occur randomly, while others are normal, such as those that guide embryonic cells as they become heart, brain, or liver cells, for example.
The most successful groups of land plants are those that evolved methods of fertilized sex cell dispersal that are independent of water and structures that protest developing embryos from drying out.
Nearly a century ago, biologists found that if they separated an invertebrate animal embryo into two parts at an early stage of its life, it would survive and develop as two normal embryos.
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26. 在受精后大约六七个星期时，男性和女性胚胎之间没有什么差别。
For about six or seven weeks after conception, there is no differentiation between male and female.
《柯林斯英汉双解大词典》
27. 许多物种的早期胚胎具有其祖先的特性。
Early embryos of many species develop ancestral features.
Because current federal law already forbids the use of federal funds to create embryos for research or to knowingly endanger an embryo 's life, NBAC will remain silent on embryo research.
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29. 冷冻损伤胚胎的确切数目各不相同。
The exact number of embryos lost to cryoinjury varies.
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30. 在黄体降解的母羊中，可用的胚胎恢复率非常低。
Useable embryo recovery was significantly low in ewes of corpora lutea degradation.
