With no natural predators on the island, the herd increased rapidly.
由于岛上没有天然食肉动物，牧群的数量迅速增加。
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.
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。
Natural predators are cheaper.
天然食肉动物更廉价。
This is a talent we share with all natural predators.
这是一个人才，我们同所有的天敌份额。
As such, the blue whale has virtually no natural predators.
像这样，蓝鲸已经实际上没有自然的捕食者。
With no natural predators in America, the bugs' population is soaring.
因为在美国没有天敌，它们数量暴增。
These invasive species – brought to the island by people – have no natural predators.
这些由当地人引进的入侵物种没有天敌。
Many invasive species are successful because they have no natural predators in their new environment.
由于在新环境中没有天敌，很多入侵物种得以成功入侵。
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。
Unlike in the rest of Canada, the moose has no natural predators on the island, where the native wolf went extinct.
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。
In an aquarium, clownfish from the control group instinctively fled from the scents of their natural predators.
在水族箱里，对比组的小丑鱼本能地逃离它们天敌的气味。
There was no agricultural run-off, and chemical pesticides were replaced with natural predators such as ladybirds.
而且没有农业径流和用来对付瓢虫等天敌的化学农药。
With no natural predators, herd sizes can double every four years, taxing the land and the animals that share it.
由于没有天敌的存在，所以畜群规模每四年翻一番。当地的土地因此负担沉重，动物们只能分享那贫瘠的土地。
The intervening three decades are fraught with peril, from natural predators to oil spills to entanglement in fishing gear.
这三十年间充满着危险，从自然界的虐食者到油泄漏到捕鱼设备的纠缠物。
The world's largest living tortoises are an icon of evolution, growing so large on the isolated islands because of the absence of natural predators.
世界上现有的最大乌龟是进化的最好诠释，它们能长到如此之大是由于生活区不存在天然的猎手。
Scientists attribute this to good quality water and a lack of natural predators in the water channel that runs under the Palatine Hill and surfaces in the Trajan Market.
科学家认为这全归功于水质良好，加上 这条流经派拉庭山丘地底并在图拉真市集浮现出来的水道，没有大自然掠夺者。
Polar bear does not have natural predators and we believe no animals could possibly challenge them in their territory. Yet, the population of polar bear has been decreasing.
北极熊没有天敌，我们相信它见得到的动物没有能打得过它的，可是北极熊的数量每年却在减少。
With few natural predators, they have been rapidly expanding in Caribbean and Atlantic waters, voraciously preying on local fish, shrimp and crab populations across the region.
狮子鱼的天敌极少，主要以小鱼、虾和螃蟹味主食，它们在加勒比海和大西洋海域迅速繁殖起来。
The barge used one-tenth as much water as a comparable field farm. There was no agricultural run-off, and chemical pesticides were replaced with natural predators such as ladybirds.
开普罗介绍说，驳船上的用水只有普通田地的十分之一，也没有农业径流，使用生物天敌防治像瓢虫这样的温室蔬菜害虫而不是化学农药。
Besides, our environmental friendly farming methods have created a habitat for the growth of beneficial insects such as ladybugs and spiders which are the natural predators of pests.
除此之外，诚兴绿色环保的耕作方式也为有益昆虫建立良好的生长环境，如：瓢虫、蜘蛛等，它们都是天然的捕虫勇士，减低害虫对蔬菜的威胁。
Dr Abrahams thinks it possible that fast-growing salmon could displace the natural sort in places where predators are rare.
亚伯拉罕博士认为在食肉的天敌很少出没的地方快速生长的鲑鱼可能会取代自然生长的同类。
The pattern and colors actually help distort the fish's outline when seen in natural light at a distance through water, helping the animal disappear from the view of potential predators.
其实，若是在自然光下、于水中一段距离外，这种图案和色彩有助于扭曲鱼的轮廓，让它在潜在掠食者的视线中消失。
Every plant, Ames said, is full of 100 or more chemicals, including "natural pesticides," which the plants make to defend themselves against predators.
Ames说，每一种植物，都富含100种以上的化学物质，包括“天然农药”，这是植物为了保护自己免于被取食者侵害而产生的。
With fewer predators around, though, this natural brake on "enhanced" salmon would be gone and they might, indeed, take over from the natural ones.
而在食肉天敌较少的环境下，遏制“放大型”鲑鱼的自然气力消失了，它们确实可能取代天然生长的鲑鱼。
With fewer predators around, though, this natural brake on "enhanced" salmon would be gone and they might, indeed, take over from the natural ones.
而在食肉天敌较少的环境下，遏制“放大型”鲑鱼的自然气力消失了，它们确实可能取代天然生长的鲑鱼。
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