正如你在照片里看到的，华盛顿州斯波坎市一家银行办公室的窗台下面，生活着一群绿头鸭。
As you can see in the photo, a group of mallards lives under the windowsill of a bank office in Spokane, Washington.
一种野鸭（绿头鸭），其雄鸟具有绿色的头和颈。大部分驯化了的家鸭都是绿头鸭的后裔。
A wild duck (Anas platyrhynchos) of which the male has a green head and neck. Most domestic ducks descend from the mallard.
一只绿头鸭突然飞起，愤怒地尖鸣一声直冲天空。
A mallard suddenly took wing, rising steeply into the air with an angry squawk .
其它研究发现，SCCP能造成绿头鸭蛋壳轻微变薄，并能损害水獭的肝脏。
Other studies have found that SCCPs can cause slight egg shell thinning in mallard ducks and can damage the livers of otters.
进化树分析表明，鸡MTHFR氨基酸序列与绿头鸭和鸿雁的关系较近。
The phylogenetic tree analysis indicated the broiler MTHFR was closely related to mallard and swan goose.
正如你在照片里看到的，华盛顿州斯波坎市一家银行办公室的窗台下面，生活着一群绿头鸭。
As the photos in this post show, there are a lot of mallard ducks that live on a ledge underneath the offices of a bank in Spokane, Washington.
绿头鸭一种野鸭（绿头鸭），其雄鸟具有绿色的头和颈。大部分驯化了的家鸭都是绿头鸭的后裔。
A wild duck(Anas platyrhynchos)of which the male has a green head and neck. Most domestic ducks descend from the mallard .
绿头鸭又叫做野鸭，是一种会依季节移栖的候鸟，冬天时飞向温暖的南方，夏天时再飞回北方的繁殖地进行繁殖。
The mallards are migratory birds sometimes called wild ducks. They fly to the warm South in winter, then return to the North in summer for breeding.
第二天早上，妈妈将那只公雁放在了鸡窝里，让它在那里和一群正在孵蛋的母鸡、几只矮脚鸡、绿头鸭和一对家鹅一起过冬。
In the morning Mom places the gander in the barn where she winters a flock of laying hens, some bantams, mallard ducks and a pair of domestic geese.
春季的一天，沿着我父亲后院长满树木的池塘岸边，我们碰巧发现一个被遗弃的散落的绿头鸭窝，12个蛋中只剩下5个还没有破壳。
The mallard nest that we had stumbled upon that spring day along the wooded shore of my father's backyard pond was abandoned and strewn apart. only five of twelve eggs were left unbroken.
春季的一天，沿着我父亲后院长满树木的池塘岸边，我们碰巧发现一个被遗弃的散落的绿头鸭窝，12个蛋中只剩下5个还没有破壳。
The mallard nest that we had stumbled upon that spring day along the wooded shore of my father's backyard pond was abandoned and strewn apart. only five of twelve eggs were left unbroken.
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