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.
几个世纪后的唐宋元时期，中国的杜环、意大利的马可·波罗等伟大冒险家在海上和陆上的古老丝绸之路上留下了足迹。
Centuries later, in the years of Tang, Song and Yuan Dynasties, such silk routes, both over land and at sea, great adventurers, including Du Huan of China, Marco Polo of Italy, left their footprints along these ancient routes.
曾经生活在澳大利亚这片广袤大陆上的巨型动物经历了什么？
What happened to Australia's megafauna, the giant animals that once existed across this enormous continent?
驻扎在南极洲需要适应在地球上最干燥、风最大和最冷的大陆上生活。
Being stationed in Antarctica involves adapting to life on the planet's driest, windiest and coldest continent.
蔗蜍本身变成了一种害虫，并且已经破坏了那片大陆上的很多野生动物。
The cane toad itself became a pest and has destroyed much of the wildlife on that continent.
大陆上的浅海可能减轻了附近空气所受的影响，以保持其相对稳定的温度。
The shallow seas on the continents probably buffered the temperature of the nearby air, keeping it relatively constant.
其他机制更可能是较为循序渐进的，在更长时间段或在不同的大陆上的不同时间发生。
Other mechanisms would be more likely to have taken place more gradually, over an extended period, or at different times on different continents.
当大陆上的冰开始融化时，两块冰原之间形成了一条无冰走廊，这一证据主要来自放射性碳测年法。
Evidence that an ice-free corridor between two ice sheets developed when the continental ice first began to melt came primarily from radiocarbon dating.
他很有说服力地指出，直到很久以后，当大陆上的冰开始最后消退时，才有了这样一条没有冰的走廊。
He persuasively argued that such an ice-free corridor did not exist until much later, when the continental ice began its final retreat.
他们在大部分区域内都可航行，只是偶尔需要进行陆上搬运，比如说把独木舟搬到附近的另一条小溪中。
They could travel throughout the area only occasionally having to portage, to carry the canoe over a land short distance to another nearby stream.
当冰河时代开始时，大陆上的冰原逐渐增大，从海洋中蒸发出来的水逐渐减少，而这些水最终又会回到陆地上。
When an ice age begins, the continental ice sheets grow, steadily reducing the amount of water evaporated from the ocean that will eventually return to it.
一股陆上龙卷风袭击了阿肯色州。
鱼类的鳃与陆上动物的肺类似。
The gills of fishes are analogous to the lungs in terrestrial animals.
八十七年之前，我们的祖先在这大陆上建立了一个国家。
Four score and seven years ago our fathers brought forth on this continent a new nation.
他四肢抽搐着像一只陆上的鱼。
他们把装备转到陆上搬运以绕过湍滩。
伊瓜苏瀑布是美洲大陆上最宽的瀑布。
整个非洲大陆上只有4%的土地得到灌溉。
非洲联盟未能协助非洲大陆上饥饿的人民。
The African Union has dismally failed to help the continent's starving people.
殖民者最先看到的是新大陆上长满树木的海岸。
The colonists' first glimpse of the new land was a vista of dense woods.
除了南极洲，在每片大陆上都能发现害虫烟粉虱的踪迹。
Whiteflies are pests in every continent that they are found in-and they are found in every continent except Antarctica.
因此海上的风轮机可以比近海和陆上的风轮机具有更高的发电效率。
A turbine placed there would thus generate more power than its inshore or onshore Cousins.
他还表示，保护陆上领土要比保护沿海城市仰光容易一些。
It is "more comfortable defending a land perimeter" such as Pyinmana than a coastal city such as Rangoon, he said.
这是由于来自海洋的升温，大陆上的很多气候是受海洋热量的影响的。
It takes a while for the oceans to warm up, and a lot of weather on land is driven by the heat of the oceans.
如果计算人均购买力，它将跻身拉丁美洲大陆上最富裕的五个国家之一。
Accounting for purchasing power, it is one of the five richest countries in mainland Latin America.
譬如说，第一，通过陆上铁路，加大俄罗斯对中国石油的出口。
We have agreed to increase Russian oil exports to China through use of railways.
一些私营公司曾尝试在大桶中或者在陆上通过其他的一些的方法种植藻类。
Some private companies have tried growing algae in vats or through other methods on land.
一些私营公司曾尝试在大桶中或者在陆上通过其他的一些的方法种植藻类。
Some private companies have tried growing algae in vats or through other methods on land.
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