一些人建议引入鹿的天敌，如狼、狮子和熊，到鹿过多的地区。
Some suggest bringing in natural enemies of deer, such as wolves, lions and bears, to areas with too many deer.
阻止蕨菜蔓延的一种潜在的廉价和自我维持的方法是引入该植物的天敌。
One potentially cheap and self-sustaining method of halting the spread of bracken is to introduce natural enemies of the plant.
有些鱼和蜗牛以海星为食，特别是巨型法螺蜗牛，它是海星的主要天敌。
There are fish and snails that eat starfish, particularly the giant triton snail, which is the main predator of the starfish.
麋鹿穿过冬天的冰雪，到达苏必利尔湖的皇家岛，在那里，它们没有天敌，自由繁殖。
Moose reached Isle Royale in Lake Superior by crossing over winter ice and multiplied freely there in isolation without predators.
由于没有天敌，又有大片绿色的郊区禁止捕猎，野生动物官员估计，新泽西鹿的数量已经超过17.5万只。
With no natural predators and expanses of green suburban neighborhoods that allow no hunting, wildlife officials estimate the New Jersey deer population to have grown to exceed 175,000.
没有天敌的大象必须在广袤的大地上四处漫游，才能获得每日约300公斤（合660磅）的草、树叶及树的口粮。
Elephants, which have no predators, must roam widely to get their daily ration of about 300 kilograms (660 pounds) of grass, leaves, and twig.
这种黄色的花是昆虫的天敌。
任何气味都可能引来试图吃掉熊猫宝宝的天敌。
Any smell might attract natural enemies that would try to eat the little panda.
他最大的梦想是找到一个最好的池塘，在里面自由地游泳，而不用担心他的天敌——水蛇。
His biggest dream was to find the best pond to swim in freely without worrying about water snakes, which were his natural enemies.
长角甲虫幼虫的部分在寻找天敌的天敌中起着重要的作用。
Frass of long-horned beetle larvae plays an important role in natural enemies searching for their cerambycid hosts.
淡水河豚没有天敌，除了人类。
储存衣服的天敌是吃衣物的虫子。
因为在美国没有天敌，它们数量暴增。
With no natural predators in America, the bugs' population is soaring.
是昆虫的天敌，人类的朋友。
家猫被视为入侵物种且几乎没有天敌。
they are regarded as an invasive species and have few natural enemies to check their numbers.
还是为了吓唬天敌？
他们对捕食数百万幼小牡蛎的动物天敌也所知无几。
And they knew little about the predators that attack and eat baby oysters by the millions.
而且没有农业径流和用来对付瓢虫等天敌的化学农药。
There was no agricultural run-off, and chemical pesticides were replaced with natural predators such as ladybirds.
在水族箱里，对比组的小丑鱼本能地逃离它们天敌的气味。
In an aquarium, clownfish from the control group instinctively fled from the scents of their natural predators.
但这种关系只是一种巧合：小动物的天敌通常都远多与大动物。
That relationship, however, is just a coincidence caused by the fact that small beasts usually have more predators than large ones do.
欧洲殖民者向北美洲引入了家猫；家猫被视为入侵物种且几乎没有天敌。
Household cats were introduced in North America by European colonists; they are regarded as an invasive species and have few natural enemies to check their Numbers.
“蜘蛛是昆虫的天敌，有了它能避免农民大量喷洒杀虫剂”，雷诺兹说。
"Spiders are key predators of insects and can alleviate the need for farmers to spray large quantities of pesticide," Reynolds said.
跟加拿大其他地方不同，驼鹿在纽芬兰没有天敌，这里野生狼群已经灭绝。
Unlike in the rest of Canada, the moose has no natural predators on the island, where the native wolf went extinct.
有一种观点认为它们总能逃避天敌，例如被寄生物控制于自己的居住范围。
One idea is that they've escaped their enemies, for example, the parasites that keep them in check on their home turf.
鸟类是瓢虫的主要天敌，有时他们也是青蛙，黄蜂，蜘蛛和蜻蜓的战利品。
They may also play dead. Birds are ladybugs' main predators, but they also fall victim to frogs, wasps, spiders, and dragonflies.
布兰·卡多表示，由于臭鼬在自然界没有任何天敌，它们的数量就会增加到很多。
Brancato says skunk populations can grow large because they don't really have any natural predators.
布兰·卡多表示，由于臭鼬在自然界没有任何天敌，它们的数量就会增加到很多。
Brancato says skunk populations can grow large because they don't really have any natural predators.
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