It was good to be back on land.
回到陆地上真好。
Most reptiles reproduce by laying eggs on land.
大多数爬行动物通过在陆地产卵进行繁殖。
腕龙曾住在陆地上。
大多数哺乳动物生活在陆地上。
Without ice, they have to stay on land.
没有了冰，它们只能待在陆地上。
The legs were certainly functional both on land and at sea.
无论陆地还是海洋，这些腿都能发挥作用。
It is a more continuous record than that taken from rocks on land.
它比陆地上岩石的记录更为连续。
It was undoubtedly a whale that linked life on land with life at sea.
毫无疑问，这是一种联系着陆地生命和海洋生命的鲸鱼。
It was undoubtedly a whale that linked life on land with life at sea.
毫无疑问，是鲸这种动物把陆地上和海洋中的生命联系起来。
At 430 meters below sea level, the Dead Sea is Earth's lowest point on land.
死海位于海平面以下430米，是地球陆地上的最低点。
Aquatic exercise is like exercise on land, but you do it in a swimming pool.
水上运动就像陆地上的运动，但你是在游泳池里做这个的。
A noise of one hundred and twenty decibels on land causes pain to human ears.
陆地上120分贝的噪音会使人的耳朵疼痛。
Most animals on land are known to us, but many living things underwater are not.
陆地上的大多数动物我们都知道，但水下的许多生物却不为人所知。
Have you ever heard of the trees that are homes over animals both on land and sea?
你有没有听过有一种树木，它们是陆地动物和海洋生物的家园？
Some hypotheses fail to account for simultaneous extinctions on land and in the seas.
有些假说不能解释同时发生在陆地和海洋的灭绝。
Later ancestors lived on land and stayed there for a very large number of generations.
后来的祖先生活在陆地上，并在那里居住了一代又一代。
There was no overlap, except when they added some species that spend time both in water and on land.
除了他们增加了一些既生活在水中又生活在陆地上的物种外，物种之间没有重叠。
Such feedbacks might involve ice on land and sea, clouds, or water vapor, which also absorb radiant heat.
这种反馈可能涉及陆地和海洋上的冰、云或水蒸气，这些也会吸收辐射热。
You might wonder how we can tell whether fossil animals lived on land or in water, especially if only fragments are found.
你可能想知道我们如何分辨化石上的动物是生活在陆地上还是水里，特别是如果只发现了化石碎片。
The revolution involved intensive commercial farming and the growing of animal fodder on land not previously used for crops.
这场变革涉及到集约化的商业化农业，以及在以前不用于种植作物的土地上种植动物饲料。
Glaciers are slowly moving masses of ice that have accumulated on land in areas where more snowfalls during a year than melts.
冰川正在缓慢地移动大量的冰，这些冰是在每年降雪量大于融化量的地区，在陆地上累积起来的。
Fossilized remains of Acanthostega, a primitive fish, reveal that even though the animal had rudimentary limbs, it could not walk on land.
棘螈是一种原始鱼类，它的化石遗迹显示，尽管棘螈有基本的四肢，但它却不能在陆地上行走。
These troops have rarely been at the center of the action: in Afghanistan, they stay in the relatively calm north; in Lebanon, they patrol at sea, not on land.
这些部队鲜少处于行动的中心：在阿富汗，他们留驻于相对平静的北方；在黎巴嫩，他们则在海上巡逻，而不是在陆地上。
It's true that as people in developing nations move from the countryside to the city, the shift may reduce the pressure on land, which could, in turn, be good for the environment.
的确，随着发展中国家的人们从农村搬到城市，这种转移可能会减少对土地的压力，这反过来可能有利于环境。
When they do forage for food and for shelter materials, they have to leave their homes and go up on land where their main predators are.
当它们寻找食物和遮蔽物的时候，它们不得不离开家，到主要捕食者所在的陆地上去。
They fought both at sea and on land.
他们在海上和陆上都打过仗。
Members of all parties endorsed a ban on land mines.
各党派成员都赞同禁用地雷。
In a twinkling, you will be safe on land.
转瞬之间，你们就会安全上岸了。
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