这种训练没有效果，浪费了稀有资源。
This kind of training is ineffective, and wasteful of scarce resources.
他们在很多地方重新种上了稀有罕见的植物。
They have replanted many areas with rare and unusual plants.
稀有的树木被细心地从山坡上移植下来。
熊猫是最稀有的动物之一。
有钱人会相互竞争，花大量的钱为他们的花园买最稀有的花。
Wealthy people would compete, spending enormous amounts of money to buy the rarest flowers for their gardens.
如果你对硬币收集感兴趣，首先要做的就是找到一枚稀有的硬币。
If you are interested in coin collecting, the first thing to do is to find a rare coin.
在种子世界里，这使得它们很稀有，因为大多数开花植物的种子都很结实。
In the seed world, that makes them rare, because most seeds from flowering plants are quite robust.
动物园里有一些世界上最美丽和稀有的动物，为你提供了参观野生动物的好机会。
The Zoo has some of the most beautiful and rare creatures in the world and offers you a great chance to visit wild animals.
这一沉积层富含稀有金属铱，以及其他在陨石中较丰富而在地壳中十分罕见的元素。
This sediment layer is enriched in the rare metal iridium and other elements that are relatively abundant in a meteorite but very rare in the crust of Earth.
他们偶然发现一种稀有金属铱的含量在边界处突然变得很丰富，然后又慢慢地消失了。
They had found, accidentally, that a rare metal, iridium, suddenly became very abundant exactly at the boundary and then slowly fell away.
这是一种生长在澳大利亚的非常稀有的树——冬花，但它更广为人知的名字是夜冠橡树。
It's a species of a very rare tree that grows in Australia, Eidothea hardeniana, but it's better known as the Nightcap Oak.
发现鲸和海豚身上有后肢；这种稀有的现象是由于它们在陆地上的祖先身上的特征再次被遗传。
Whales and dolphins have been found with hind limbs; this rare occurrence is due to the reemergence of a trait they inherited from their terrestrial ancestors.
现在，外来食肉植物的黑市交易非常活跃，以至于植物学家一直对某些稀有物种的位置三缄其口。
The black market trade in exotic carnivorous plants is so vigorous now that botanists are keeping the location of some rare species a secret.
她16岁时以高中班第一名的成绩毕业，进入了文秘学校，最后在一家稀有木材公司做行政秘书。
At 16, she graduated first in her high school class, went on to secretarial school and finally worked as an executive secretary for a rare wood company.
钻石是稀有火成岩（称为煌斑岩和金伯利岩）中偶尔出现的一种成分，其年代测定方法从未令人满意。
Diamonds, an occasional component of rare igneous rocks called lamproites and kimberlites, have never been dated satisfactorily.
珊瑚海是澳大利亚东北海岸独特的生物多样性天堂，有未开发的珊瑚礁、稀有的鲨鱼和大量的外来鱼类。
Home to virgin reefs, rare sharks and vast numbers of exotic fish, the Coral Sea is a unique haven of biodiversity off the northeastern coast of Australia.
她正在努力寻找一种方法，从那些适应极端干旱天气的稀有野生植物中获取特性，并将它们用于粮食作物。
She is hard at work finding a way to take traits from rare wild plants that adapt to extreme dry weather and use them in food crops.
当一种猎物变得稀有时，如果捕猎者能够转向其他更容易找到的物种，这种转变可以让原来的猎物数量得到恢复。
And if a predator can move on to another species that is easier to find when a prey species becomes rare, the switch allows the original prey to recover.
稀有沙漠动物的捕猎者通过管理所他们捕猎和采集的野生资源来应对干旱，尤其是必须有稳定水供应才能生存的野牛。
The people who hunted the sparse desert animals responded to drought by managing the wild resources they hunted and gathered, especially wild oxen, which had to have regular water supplies to survive.
欧文斯和奥尔森假设，如果类胡萝卜素是稀有的或对健康有要求的，则通过着色指示的类胡萝卜素的存在在配偶选择的背景下将是有意义的。
Owens and Olson hypothesize that the presence of carotenoids, as signaled by coloration, would be meaningful in the context of mate selection if carotenoids were either rare or required for health.
“像我这样的人可能正在以一种很小的方式产生影响。”简·麦考特曾经是一名投资银行家，现在在英国中部地区经营着自己的40公顷土地，囤积着一些稀有品种。
"People like me may be making a difference in a small way," Jan McCourt, a onetime investment banker now running his own 40-hectare spread in the English Midlands stocked with rare breeds.
他收藏的植物包括许多稀有品种。
古董的价值依它们的保存状况和稀有程度而定。
The value of antiques will depend on their condition and rarity.
钻石没有多少内在价值，它们的价格几乎完全取决于其稀有程度。
Diamonds have little intrinsic value and their price depends almost entirely on their scarcity.
负责繁育计划的林姆尼港保护区迎来了一只稀有的黑犀牛幼崽。
Port Lympne Reserve, which runs a breeding programme, has welcomed the arrival of a rare black rhino calf.
现在由于价格和稀有度，香料不是欧洲本土的，必须进口。
Now for cost and rarity, spices aren't native to Europe and they had to be imported.
如果你拥有一枚很少有人感兴趣的稀有硬币，它的价值将低于许多人想要拥有的稀有硬币。
If you own a rare coin that few people are interested in, it will be worth less than a rare coin that many people want to own.
主要的差别是，相比于太阳，阿连德陨石缺失了大部分的挥发性元素，例如氢、碳、氧、氮和稀有气体。
The major difference is that Allende is depleted in the most volatile elements, like hydrogen, carbon, oxygen, nitrogen, and the noble gases, relative to the Sun.
装饰刮身板也相对昂贵和稀有，尤其是在英国。
Decorated strigils were also relatively expensive and rare, especially in Britain.
装饰刮身板也相对昂贵和稀有，尤其是在英国。
Decorated strigils were also relatively expensive and rare, especially in Britain.
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