Frogs likes eating harmful insects.

青蛙喜欢吃害虫。

Mosquitoes and flies are harmful insects.

孩子和苍蝇是害虫。

Frogs like eating harmful insects. They protect our crops.

青蛙喜欢吃昆虫。它们保护我们的庄稼。

Frogs likes eating harmful insects. They protect our crops.

青蛙喜欢吃害虫。它们保护我们的庄稼。

Some insects help us by killing other harmful insects, which damage plants.

有些昆虫帮助人们杀除毁坏植物的其他害虫。

Mosquitoes and flies are harmful insects. They spread diseases and threaten out health.

孩子和苍蝇是害虫。它们散播病菌，威胁我们的健康。

Instead, they are used to get some insects to come to the plant to help control harmful insects.

而是用于使一些昆虫过来帮助控制害虫。

Usually the insect eaters are helpful to man, because they do away with harmful insects such as mosquitoes.

吃昆虫的动物通常都有益于人类，因为它们消灭诸如蚊虫之类的害虫。

Farmers know that if you reduce harmful insects and diseases in your crops, you have a chance for a better harvest.

农民都知道，如果减少农作物病虫害，就能获得好收成。

The cage-typed electric-net insect killer can be used all day long, which can widely trap and kill the crops harmful insects.

这种笼式电网灭虫器 能够全天候使用，更为广泛地引诱触杀农作物有害昆虫。

New ways have been found for controlling harmful insects, for preserving food, for packaging, storing and marketing farm products.

控制害虫、保藏食物以及包装、贮藏和推销农产品的新方法发明了。

Cane toads were introduced to Australia in 1935 with the expectation that they would protect farmers' crops by eating harmful insects.

蔗蟾于1935年被引入澳大利亚，期待它们通过吃害虫来保护农民的庄稼。

It was deliberately introduced to Australia in 1935 with the expectation that it would protect farmers' crops by eating harmful insects.

蔗蜍是在1935年由人工引进至澳大利亚的。因为它们可以吃害虫，所以希望借由它们保护农作物。

Scientists have found that a crop with a gene that kills pests can leave a poison in the soil that kills helpful as well as harmful insects.

科学家发现，带有抗虫基因的作物能在土壤里留下毒素，这种毒素既能杀死害虫也能杀死益虫。

The study demonstrates that three nematodes species have a significant practical potential in preventing and controlling the field harmful insects.

研究表明三种线虫品系在田间害虫防治上具有较高应用潜力。

Use of fertilizers, chemicals to control or destroy weeds and harmful insects, and improved methods of controlling plant and animal diseases has boosted farm production.

肥料和用以防治或铲除杂草及扑灭害虫的化学品，防止动植物病害的新方法，都是使农业增产的原因。

Birds are one of mankind's best friends, not only are they the natural predator of many types of harmful insects, they are one of the most important links in nature's food chain.

鸟类是人类最好的朋友之一，它们不但是许多害虫的天敌，自然生物链重要一环。

According to the expert's analysis, the global climate change will also promote the growth of harmful insects, which is harmful for agriculture and the physical health of people.

根据专家的分析，全球气候变化还会促进有害虫子的增长。这是对农产物和人们的身体健康造成很大的伤害。

Most roaches prefer a more conventional insect life outdoors, where they help to recycle decaying vegetation, pollinate plants, and in some cases even prey on more harmful insects.

大部分蟑螂喜欢更为传统的户外昆虫生活，它们可以帮助回收腐烂植被，帮植物授粉，甚至在一些情况下还会捕食害虫。

Growers around the world are using new methods to grow grapes to make wine. These include natural and organic methods to control harmful insects and weeds instead of using chemicals.

全世界的种植者都在使用新的方法种植葡萄来酿酒，包括用自然或有机的方法取代化学药品来控制害虫和杂草。