宰杀海豹幼仔的行为已引起了环保团体的强烈抗议。
The culling of seal cubs has led to an outcry from environmental groups.
海豹、海龟、企鹅均有鳍状肢。
驯兽人把鱼儿扔给他的海豹。
他知道一些关于海豹的事情。
也没有人留下来看海豹、长颈鹿或者河马。
And nobody stayed to see the seals, giraffes or hippos, either.
它们被称为象海豹。
他们没有看到海豹，但是他们看到了一些鲨鱼。
海豹呼吸空气，但这并不能阻止它们在水下睡觉。
Seals breathe air, but that doesn't stop some of them from sleeping underwater.
猫不捕食海豹。
最近，濒临灭绝的地中海僧海豹出现了惊人数量的死亡。
An alarming number of Mediterranean monk seals, an endangered species, have recently died.
地中海僧海豹是这个发现有细菌的地区中的唯一海豹物种。
Mediterranean monk seals are the only species of seal in the area where the bacterium was found.
沉睡在水下可以帮助这些海豹远离在水面附近捕猎它们的动物。
Sleeping deep underwater helps these seals stay safe from animals that hunt them near the surface.
来自海豹死亡海域的海水样本确实含有异常高浓度的有毒细菌。
Seawater samples from the area where the seals died did contain unusually high concentrations of the toxic bacterium.
在他们停留的最后一天，一只海豹突然从船下的水中跳出来迎接他们。
A seal popped out of the water below the ship and greeted them on the last day of their stay.
此外，海象和海豹用它们的后鳍推动自己在水中运动，而海狮用它们的前鳍。
Moreover, walruses and seals drive themselves through the water with thrusts of their hind flippers, but sea lions use their front flippers.
因此，尽管病毒和细菌毒素都能杀死海豹，但这些死亡更有可能是细菌毒素造成的。
Although both viruses and bacterial toxins can kill seals, it is more likely that these deaths were the result of the bacterial toxin.
为什么不管它们潜水的长度和深度如何，海豹在实验室潜水时总是会引起这种反应？
Why do the seal's laboratory dives always evoke this response, regardless of their length or depth?
麻斑海豹进化出的母性策略可能与它们的小体型和哺乳时消耗掉的大部分脂肪有关。
The maternal strategy evolved by harbor seals may have to do with their small size and the large proportion of their fat stores depleted in lactation.
虽然港海豹的体型较小，但其体型与大多数的otariids（海狮和海狗）相似。
Though smaller than many other phocids, harbor seals are similar in size to most otariids.
陆上食物是非常有限的，根本没有什么能与一只海豹所能给北极熊提供脂肪和能量相比。
Food onshore is very limited and there is simply nothing comparable to a seal that provides a polar bear with fat and energy.
然而，最近的实地研究显示，在野外潜水时，海豹通常会直接冲向猎物，并在不到20分钟内返回水面。
Recent field studies, however, reveal that on dives in the wild, the seal usually heads directly for its prey and returns to the surface in less than twenty minutes.
在实验室里，当海豹潜入到水面以下并停止呼吸时，它的心脏跳动得更慢，需要的氧气更少，动脉也会收缩。
In the laboratory, when the seal dives below the surface of the water and stops breathing, its heart beats more slowly, requiring less oxygen, and its arteries become constricted.
我的儿子罗南看着我，挑起一侧眉毛。他的眼睛明亮而专注。罗南在爱尔兰语中的意思是“小海豹”，这很适合他。
My son, Ronan, looks at me and raises one eyebrow. His eyes are bright and focused. Ronan means "little seal" in Irish and it suits him.
由于如此大比例的脂肪储备在喂养过程中会消耗殆尽，海豹母亲显然不能仅靠生育前储存的能量来维持整个哺乳过程。
Since such a large proportion of their fat stores is exhausted despite feeding, mother seals clearly cannot support all of lactation using only energy stored before giving birth.
海豹在水下更长时间地遨游，在这段时间里，它似乎是在探索遥远的路线，或是在躲避捕食者，这确实能唤起我们在实验室里看到的潜水反应。
The seal's longer excursions underwater, during which it appears to be either exploring distant routes or evading a predator, do evoke the diving response seen in the laboratory.
它们在海豹下方等待，然后游上来，以每小时40公里的速度突然撞向海豹，一口就把海豹咬死。
They wait below the seals and then swim up and crash into them by surprise at 40 kilometres per hour, killing them with one bite.
北极熊喜欢捕食海豹。
它们导致了北极熊和海豹数量的减少，而北极熊依靠海冰捕食海豹。
They have pushed down the number of polar bears and seals while polar bears depend on sea ice for hunting seals.
北极熊在冰上捉海豹吃。
Yulelogs 是一只可爱的灰色海豹。
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