查询词典 walruses

Biologists have long maintained that two groups of pinnipeds, sea lions and walruses, are descended from a terrestrial bearlike animal, whereas the remaining group, seals, shares an ancestor with weasels.

上文第三句以趋同进化解释一种现象：鳍足确实有可能是为了适应水中生活而作出的一个必要的反应；龟、鲸鱼以及儒艮同样都长有鳍足。

I normally eat seals but also can dine on walruses , mussels or even berri es and seaweed.

我通常吃海豹，但也能吃海象，蚌类，甚至是浆果和海藻。

In Igloolik, Nunavut, Nigel dives from an iceberg and swims with walruses; bowhead whales; an update on the nine arctic fox cubs.

在伊格卢利克，努纳武特，奈杰尔从冰山跳水和游泳与海象； bowhead鲸；了最新的9北极狐小熊。

Evidence suggests that the bonds between walruses are exceptionally strong: the animals share food, come to one another's aid when under attack and nurse one another's young.

证据显示，海象彼此间的关系超乎寻常的牢固：它们会分享食物，遭遇攻击会相互支援，也会照顾彼此的小象。

A hard smooth ivory colored dentine that mak es up most of the tusks of elephants and walruses .

一种坚硬而光滑的乳白色牙质，构成大象和海象的大部分长牙。

Arctic sunlight dapples a pod of Atlantic walruses swimming in Canada's Foxe Basin.

北极的日光晒起斑纹一个豆荚状的斑纹，大西洋海象群游泳在加拿大的福克斯湾。

National Geograph Wallpapers Sun-Dappled walruses Arctic sunlight dapples a pod of Atlantic walruses swimming in Canada's Foxe Basin .

北极的阳光斑斑点点地落在一小群正在加拿大福克斯湾畅游的大西洋海象身上。

Arctic sunlight dapples a pod of Atlantic walruses swimming in Canada's Foxe Basin. Walruses are clumsy on land but swim with fluent grace.

北极的阳光在一群游弋在加拿大福克斯湾的大西洋海象身上投下点点光斑。

Walruses have enlarged upper canine teeth, or tusks, up to 3 feet long.

海象具有巨大的上犬齿，或獠牙，可以达到3英尺长。

NEW YORK – Scientists say they've found a "missing link" in the early evolution of seals and walruses — the skeleton of a web-footed, otter-like creature that was evolving away from a life on land.

纽约--科学家称他们发现了一个海豹和海象早期进化的"遗失中的一环"--一种拥有蹼的脚，类水獭生物的化石。这种生物正在朝进化远离陆地方向进化。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。