查询词典 Mammals

They concluded that such upwellings might indeed account for the catastrophic fish deaths, but that they would not explain the deaths of insects, reptiles, birds and mammals, since these animals breathe air rather than relying on dissolved oxygen.

于是他们得出了结论，这些上升流可能正是造成鱼类灭亡灾的主要原因。但是这样并不能解释昆虫，爬行动物，鸟类和哺乳动物的死亡，因为这些动物靠空气呼吸，而不是靠溶解氧。

They concluded that such upwellings might indeed account for the catastrophic fish deaths, but that they would not explain the deaths of insects, reptiles, birds and mammals, since these animals breathe air rather than relying on dissolved oxygen.

他们认为这样的湖水上涌的确有可能造成鱼群灾难性死亡，但是却无法解释为什么那些呼吸空气而不是依赖溶于水的氧气存活的昆虫、爬行动物、鸟类以及哺乳动物也大量死亡。

Most mammals rely on speed to escape being eaten, so even solitary herbivores would be badly advised to grow udders until the proper time.

大多数哺乳动物依靠速度来逃脱被捕食的命运，所以甚至独居的食草动物最好也是在合适的时候再发育乳房。

Our data provide a first and critical step towards a highly efficient transposon system for a variety of genetic manipulations in mammals.

我们的实验结果为在哺乳动物和其它脊椎动物中建立一个作为多功能遗传分析工具的高效转座系统迈出了关键性的第一步。

Therefore, both TE-siRNAs and TE-piRNAs repress transposon transcripts in flies and mammals FIG.

因此，TE-siRNA和TE-pi RNA抑制了果蝇和哺乳动物中的转座子转录。

WASHINGTON - Scientists unearthed a skull of the most primitive four-legged creature in Earth's history, which should help them better understand the evolution of fish to advanced animals that walk on land. The 365 million-year-old fossil skull, shoulders and part of the pelvis of the water-dweller, Ventastega curonica, were found in Latvia, researchers report in a study published in Thursday's issue of the journal Nature. Even though Ventastega is likely an evolutionary dead-end, the finding sheds new details on the evolutionary transition from fish to tetrapods. Tetrapods are animals with four limbs and include such descendants as amphibians, birds and mammals.

华盛顿-科学家挖掘出一副地球历史上最原始的四足生物头骨，这个有利于帮组他们更好理解鱼类进化成为更先进的陆地行走生物，这个有着三亿六千五百万年年龄的头骨，肩膀和水生生物的一部分骨盆，Ventastega curonica，在Latvia被发现，研究者一篇研究报告发表在在星期三出版的自然杂志上，尽管Ventastega 可能是一个进化的死胡同，这个发现给出了从鱼类到四足动物进化变迁过程的新细节，四足动物是使用四肢的动物并且包括下属的比如两栖类动物，鸟类和哺乳类动物。

The bony fish, or teleosts, are unique for the zonal distribution of pituitary cells in the pituitary, which is quite different from the random distribution reported in mammals.

硬骨鱼的脑下垂体细胞的分布有别於哺乳类的随机分布而是有特定区域分布。

In mammals, the Notch signaling pathway is critical for embryonic development, as targeted disruption of Notch1 or its downstream transcription factor RBP-J in mice resulted in disorganization of somites and delayed closure of neurotube, which finally leads to early embryonic lethality.

Notch信号途径在哺乳动物的胚胎发育中起着关键的作用。

Sloths are medium-sized mammals that live in Central and South America.

树懒是一种生活在中南美洲的中等体型哺乳动物。

In fact, sloths only move two to three meters per minute, which makes them the slowest mammals in the world.

事实上，树獭每分钟只移动二到三公尺，这让它们成为世界上最迟缓的动物。

I didn't watch TV last night, because it .

昨晚我没有看电视，因为电视机坏了。

Since this year, in a lot of villages of Beijing, TV of elevator liquid crystal was removed.

今年以来，在北京的很多小区里，电梯液晶电视被撤了下来。