Whom the gods love die young， it is the same with insects.When is your last time to see a ladybug or a firefly? Now coming across these lovely little creatures has become something unusual. And the possible occasion for us to see many a butterfly at a time is on a wedding.Why?

Because there are fewer and fewer these so called“good insects”—— lovely tiny flying dancers that do not trouble people and can even add beauty to the natural environment.

While it seems that“bad”insects like mosquitoes，ticks and cockroaches that can harm the environment or humans（Many are known to bite or sting， others carry dangerous diseases.）see the increase of their population and stay healthy.

Scientists say there is growing evidence that these helpful insects are reducing across the world.

Many of these insects are very important to plant growth and development.They also play a big part in the food chain and can help break down dead animal bodies.

A continual drop in the number of helpful insects could result in a total breakdown of the ecosystem.

好人不長命，昆蟲亦然。你上次見到瓢蟲或者螢火蟲是什么時候？現(xiàn)在，與這些可愛的小生靈相遇變成了一種奢侈。而最有可能一次見到好多蝴蝶的場合是在婚禮上。為什么會這樣？

因為這些所謂的“益蟲”的數(shù)量一直在減少。這些可愛的會飛的小舞者不僅不煩擾人類，還讓我們的自然環(huán)境更加美麗。

同時，那些對人類和環(huán)境有害的“害蟲”，比如蚊子、蜱蟲還有蟑螂（它們有的叮咬人，有的攜帶危險的病菌）的數(shù)量沒有減少，且活得很健康。

科學(xué)家表示不斷有證據(jù)表明全球范圍內(nèi)的益蟲在逐年減少。

這些益蟲很多有益于植物的生長，它們是食物鏈重要的一環(huán)，它們還可以分解動物的尸體。

這些益蟲數(shù)量的持續(xù)下降可能引起整個生態(tài)系統(tǒng)的破壞。

Notes:

ladybug 瓢蟲

firefly 螢火蟲

tick 蜱蟲

cockroach 蟑螂

breakdown 瓦解；崩潰。