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Only during ovulation does this become thin enough to be penetrated by sperm cells.

  • 其他的精子在数小时里,于阴道微酸的并由此而在不利的环境中死去的.
  • 来源:网络文摘精选更新时间:2025-01-19 10:30:37
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  • 重点词汇
  • doesconj.做，有用，工作;
  • cellsn.<生>细胞( cell的名词复数 );小牢房;（修道士或修女住的）小房间;电池;
  • thispron.这，这个;这事，这人;这时;下面所说的事;
  • penetratedv.穿过( penetrate的过去式和过去分词 );刺入;了解;渗透;
  • spermn.精子;精液;鲸蜡油;
  • becomev.成为，变得;适合;使好看;
  • enough to足以;
  • onlyadv.只有;只不过;仅仅;唯有;…才;只能;只会不料;
  • duringprep.在…期间（的某一时间）;
  • ovulationn.排卵，产卵作用;
  • 相关例句
1、

A sperm is mostly a nucleus surrounded by little other cellular material.

精子的主要是一个细胞核和围绕该细胞核的少量其他细胞物质构成.

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2、

He has a low sperm count (= very few live male cells) .

他的精液精子计数低。

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3、

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。

《柯林斯高阶英汉双解学习词典》

4、

...a sperm donor.

精液捐献者

《柯林斯高阶英汉双解学习词典》

5、

Any disease which undermines a man's general health will interfere with his sperm production...

任何有损男性整体健康状况的疾病都会影响精子的产生。

《柯林斯高阶英汉双解学习词典》

6、

They can go to a sperm bank and take a chance on unknown genes.

他们可以去精子库,去选择不知名者的精子.

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7、

In most cases, donor sperm is obtained from a sperm bank.

大多数情况是捐精来自精子库.

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8、

Miranda : Honey, let's go to the sperm bank to search for a suitable sperm donor.

亲爱的, 我们到精子银行找找合适的精子捐赠者吧!

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9、

You went to a sperm bank?

你去精子银行?

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10、

A sperm whale is to have dived to 2000 metre.

据说一头抹香鲸潜到了2000米.

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11、

The sperm whale has about thirty teeth in its lower jaw.

在抹香鲸的下颚上大约有30颗牙齿.

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12、

The only enemy of the giant squid seems to be the sperm whale.

巨型乌贼的唯一的敌人似乎是抹香鲸.

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13、

The sperm whale does not feed on small fish like other whales.

巨头鲸不象其它鲸一样以小鱼为主食.

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14、

A sperm whale has 50 teeth.

抹香鲸有50颗牙齿.

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15、

The sperm whale is dangerous.

鲸鱼中抹香鲸最危险.

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16、

This is the largest sperm whale in the world.

这是世界上最大的一头巨头鲸.

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17、

The sperm whale therefore has to look for the squid using sound waves.

因此巨头鲸就只得利用声波来寻找鱿鱼.

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18、

The toothed whale has a large square head with a cavity that contains the so-called spermaceti.

锯齿鲸拥有很大的头颅.在头颅的腔里含有 所谓 的鲸脑油.

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19、

Photo Gallery: Whales Sperm whales'heads are filled with a mysterious substance called spermaceti.

鲸鱼图片 美术馆 .巨头鲸(抹香鲸)的头部充满一种神秘的物质叫做鲸脑.

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20、

CDU currently is a valuable diagnostic modality in the evaluation of the torsion of spermatic cord.

研究表明,CDU能够发现精索扭转并评价其程度,可帮助临床医师迅速准确地作出诊断.

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