帆状的第一背鳍在游动时提供了稳定性。
Its sail-like first dorsal fin provides stability while swimming.
在风暴期间和之后，使用回声定位的鲸鱼基本上是在盲目游动。
During and after a storm, echolocating whales are essentially swimming blind.
当你在一群鱼旁边浮潜时，你会看到每一条鱼都以同样的速度游动。
When you go snorkeling by a school of fish, you will see every single one of those fish swimming along at the same speed.
不过，走鲸的脊椎结构显示，即使没有尾片，它们在水中同样能够像现代鲸鱼那样通过身体后面部分的上下摆动来游动。
The structure of the backbone shows, however, that Ambulocetus swam like modern whales by moving the rear portion of its body up and down, even though a fluke was missing.
它们还必须不停地游动以避免下沉，因为大多数鱼基本上或完全失去了鱼鳔，这个充满气体的囊帮助大多数其他鱼保持浮力。
They must also keep swimming to keep from sinking, since most have largely or completely lost the swim bladder, the gas-filled sac that helps most other fish remain buoyant.
这条鲨鱼围绕着鱼群游动。
他在水中迅速游动。
海马常用尾巴将自己固定在水草或珊瑚枝上，以过往的浮游动物为食。
Anchoring themselves to blades of grass or fingers of coral with their tails, seahorses spend their time feeding on zooplankton.
在蛹阶段，它们不吃食物，但在水面游动时会靠两个细小的管道呼吸空气。
During the pupa stage, they do not eat foods but do sit at the surface and breathe air through two small tubes.
这种细长蜿蜒的身体能让陆地上的蛇在茂密的草丛中爬行，也能让水蛇在水中游动。
The elongated, serpentine body that allows land snakes to slither through dense grass also serves aquatic snakes in propelling through the water.
但是海洋中浮游动物每天的垂直运动——夜里上浮以寻找食物，白天下潜以躲避捕食者——也可以被视作迁徒。
But daily vertical movements by zooplankton in the ocean—upward by night to seek food, downward by day to escape predators—can also be considered migration.
人们提出了许多理论来解释食草动物，如浮游动物，在控制浮游植物高度集中地区的食草动物方面所起的作用。
Many theories have been formulated to explain the role of grazers such as zooplankton in controlling the excluded grazers from regions of high phytoplankton concentration.
不过真实的鱼群并不只是转圈游动。
大家都游动着，而鲍勃一马当先。
我们知道它们在海洋中游动。
海蝴蝶：一只正在游动的食肉性海蜗牛。
美属维尔京群岛某种不寻常的东西正在游动。
SOMETHING unusual is swimming in the sea near the United States Virgin Islands.
表面如此，但是真正的鱼群是不会螺旋状游动的。
That is a start.But real shoals do not exist to swim in circles.
在翠鸟的领地里，要有清澈的河流，有游动的鱼。
Across the kingfisher's range, wherever rivers are healthy, fish will swim.
梭鱼群形成了一堵墙，两条白顶鲨鱼绕着鱼墙游动。
While looking at the wall of barracudas, a couple of white tip sharks swam around the wall.
长高的野草在寒风中象鳗鲡似的蠕蠕游动。
橙色的圆鳍鱼始终在游动，海底的冰始终闪烁着绿光。
All the while, the orange lumpsucker swims, and the ice glows green undersea.
鳐鱼科，包括黄貂鱼和灰鳐，通过击打鳍的末端向前游动。
Fish of the family Rajidae, which includes stingrays and skate, swim by flicking the outer edges of their fins.
伦敦市场有强大的品牌，易懂的规则和游动资金。
London's market has a strong brand, its rules are well understood, and there is money sloshing around.
伦敦市场有强大的品牌，易懂的规则和游动资金。
London's market has a strong brand, its rules are well understood, and there is money sloshing around.
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