The defoliation of millions of acres of trees by massive infestations of gypsy moth caterpillars is a recurring phenomenon in the northeastern United States.

在美国东北部，舞毒蛾毛虫的大规模侵扰导致数百万英亩的树木落叶，这是一个反复出现的现象。

A history of rat infestations in major cities throughout the world.

鼠患的历史在世界各地的主要城市。

Their first map focuses on Africa, where worm infestations are worst.

他们的第一批地图着手于非洲，因为那里是寄生虫感染最多的地方。

Eosinophils can increase with allergic reactions and with parasitic infestations.

当过敏反应和寄生虫感染时嗜酸性粒细胞会增多。

In his captions, letters and journals he complained about dirty streets, insects and rat infestations.

在他撰写的图片解说、信函与日记里，他抱怨街道肮脏、虫鼠成灾。

Rothamsted Research, home to the Broadbalk experiment, has been tracking aphid infestations for 50 years.

洛桑研究院的Broadbalk实验，五十年来一直在跟踪蚜虫的侵扰。

Another is that losing our fur coats helped free us parasite infestations and the diseases they can spread.

另一种观点认为退掉毛发可以帮助我们摆脱寄生虫及其所带疾病的困扰。

Infestations of these caterpillars may defoliate oaks and other hardwood trees but usually do no permanent damage.

这些毛虫的侵扰可能使橡树落叶和其他树木的硬木树但通常都没有永久性损伤。

The arrival of warm weather raises the specter of disease and increased rat infestations caused by rotting garbage.

天气转暖使人们担心垃圾腐烂会引起疾病传播和鼠群猖獗。

Honeybees have suffered diseases and parasite infestations for as long as they've been managed, but in 2006 came an extreme blow.

蜜蜂患病和被寄生虫感染的历史几乎和它们的驯养历史一样悠久，这股风潮在2006年达到巅峰。

Farmers understand that adverse weather or severe pest infestations, for - example, can produce crop failure, or lack of response.

农民也知道如遇不利天气或虫害严重，作物会出现减产现象，或实行的各项措施达不到预期效果。

An agricultural version might also navigate around farmland, checking for weed and insect infestations, and feeding itself as it went.

农用是另一个方向，经过改造的“吃货”可以穿行在农田里，检查杂草和虫害，并将它们作为自己行驶时的动力来源。

It is effective against nail fungus, ringworm, athlete's foot, dandruff, acne and many types of infestations including lice, mites and scabies.

这是有效打击钉子真菌疥疮，癣，脚气，头皮屑，粉刺和许多类型的侵扰，包括虱，螨虫和。

The resin is produced as a defense mechanism against insect infestations. When it dries it becomes a plasticlike substance that can survive for millions of years.

树脂是树木为防御昆虫侵袭而分泌的物质，变干后呈塑料状，可以留存成百上千万年。

Pheromones are an efficient tool in the prevention and treatment of termite infestations and have consequently been the focus of a considerable amount of research.

采用信息素防治白蚁这种世界性害虫是当前白蚁研究的一大热点。

Surveys carried out in Malawi, Mozambique, Tanzania and Zimbabwe by IRLCO-CSA and Ministries of Agriculture revealed serious Red Locust infestations, particularly in Tanzania.

调查中，马拉维，莫桑比克，坦桑尼亚和津巴布韦irlco - CSA和农业部暴露了严重的红蝗灾，特别是在坦桑尼亚。

Untreated scabies infestations, especially in infants, immobilised geriatric patients, AIDS and other immunologically compromised patients can support huge Numbers of female mites.

未处理感染疥疮，尤其是婴幼儿、老年患者固定、艾滋病及其他免疫受损病人能够支持大量女性螨。

Infestations of locusts have increased in both number and severity this summer amid the continuing drought in much of north-west China's Gansu Province, the Lanzhou Morning Post reported.

据《兰州晨报》报道，中国西北部的甘肃省大部分地区持续干旱，而今年夏天的蝗灾无论在次数及程度上均有所恶化。

But what's happening is the news media attention focusing on these isolated infestations here and there creates a huge concern among people and I think we have to keep a bit of this in perspective.

但因为媒体的大肆报道这种孤立的寄生虫，在人群中间出现了许多的焦虑和恐慌，我认为这是值得商榷的。

Bed bug infestations have been reported increasingly in homes, apartments, hotel rooms, hospitals, and dormitories in the United States since 1980, according to background information in the article.

根据文章的背景资料，自从1980年来，美国已报道了在家中、公寓、旅店、医院以及宿舍中温带臭虫的侵袭事件。