标签：larvae 相关文章
Even fearsome wasps high in treetops, are no match for the implacable ants. They watch helplessly as their own larvae are stripped from their honeycomb cribs. Now, the porters take up their burdens, they carry the movable feast back to the unquenchab
自然百科2011年
AS IT IS 2013-09-24 Honoring the Victims of the Birmingham, Alabama Church Bombing 50 Years Ago From VOA Learning English, welcome to As It Is! Im Steve Ember. Today we remember a day 50 years ago this month when four African American girls were kill
2013年VOA慢速英语(九)月
Pesticide Additive Could Be One Culprit in Bee Deaths 农药添加剂是蜜蜂死亡的一大诱因 Springtime is flower season. And that includes some 90 million almond trees in California. It's the largest pollination event in the U.S.and beekeeper
2017年Scientific American(二)月
The nursery lies at the heart of a twitching, thriving structure, built almost entirely of the aunts of themselves. Long legs stuck together with tussle cores. They are the scaffolding, bricks, and mortar of the nests. But theyve been in one place fo
自然百科2011年
By Efam Dovi Accra 09 February 2007 Former U.S. President Jimmy Carter has called for urgent action to eradicate guinea worm disease in Ghana. Guinea worm is a water-born worm infection that is contracted when people drink water containing the worm's
2007年VOA标准英语（二月）
By Carol Pearson Washington, D.C. 26 June 2007 Smallpox was the first infectious disease ever to be eradicated worldwide. But now, thanks to a two-decade campaign, guinea worm disease is about to be eradicated as well. Unlike smallpox, guinea worm di
2007年VOA标准英语（六月）
Dallas Attacks West Nile Virus by Land, Air The aerial and ground fumigation programs are blanketing around 1,400 square kilometers of the county, but don't target all mosquitoes. Laura McGowan, who works with Clarke, the company contracted to carry
VOA标准英语2012年(八月)
Tiny Fly May Hold Key to New Generation of Hearing Aids Ormia ochracea, a tiny yellow parasitic fly native to Central America and the southern United States, has an unusual habit. It deposits larvae onto the backs of crickets, which burrow into the i
VOA标准英语2014年(七月)
Where every plant and animal helps sustain the whole.The waste from parrot fish cements the reef. Stinging anemones provide a haven to the vulnerable. Even killers play their part, preventing a population explosion that would destroy this fragile eco
自然百科2011年
Carnivorous Bees 蜜蜂也吃肉？ I guess you never heard of Trigona hypogea, a South American bee that not only collects meat from animal carcasses, but has more recently been discovered to have a taste for live prey as well. Scientists have seen
英语听力文摘 English Digest
By Gilbert da Costa Abuja 04 April 2008 The global campaign to eradicate the debilitating Guinea worm disease continues, with hopes for eliminating it by 2009. Four countries ended transmission of the disease in 2007. Gilbert da Costa attended a cere
VOA常速英语2008年（四月）
The threat from Liberia's caterpillar infestation is not as bad as originally thought. Entomologists have identified the caterpillars as a species that is easier to kill than those first thought to be devouring farmland near the border with Guinea a
VOA标准英语2009年(二月)
By Rachel Smalley London 04 October 2009 The foot of a person suffering from elephantiasis More than 120 million people worldwide are infected with elephantiasis, and one billion more are at risk of contracting the debilitating and disfiguring ailme
VOA标准英语2009年(十月)
Whats a Fly Doing in Antarctica ? 南极有苍蝇？ Sometimes the biggest finds are the smallest finds. Researchers examining a segment of siltstone taken from ground along the Beardmore glacier in Antarctica found something unexpected. They found a
英语听力文摘 English Digest
By Scott Stearns Dar Es Salaam 18 February 2008 President Bush is in Tanzania where he has announced a new initiative to fight malaria. VOA White House Correspondent Scott Stearns reports, the program aims to provide insecticide-treated bed nets to
VOA常速英语2008年（二月）
Honeybees in Winter 一只蜜蜂无法度过严寒的冬天。一群蜜蜂则不同。据说蜂箱中的蜜蜂要过冬的时候，往往要抱成一团。最外面的一层是工蜂，它们拼命地煽动着翅膀，像厚厚的衣服一样阻隔着外
英语听力文摘 English Digest
Smallest Fish 最小的鱼 澳洲科学家宣称，他们发现了世界上最小的鱼类，这种鱼的寿命只有两个月，也不会发育出鱼鳍，牙齿和鱼鳞等构造。 这种鱼名为大型婴儿鱼(Stout Infantfish)，是澳洲博物馆
英语听力文摘 English Digest
Fatherless Honeybee s How male honeybee s can be without fathers? The reason lies in whats called a haploidiploid system of sex determination. Approximate ly one-fifth of the animal kingdom, including ants and wasp s , use this system. What it boils
英语听力文摘 English Digest