Death rates for human infected are around 50 percent but, so far, humans have been infected mostly by direct handling with infected birds.
感染上禽流感的人类的死亡率是50%，但是迄今为止，被感染的人类大多数是通过与被感染鸟类的直接接触而传染上的。
Before Columbus sailed the Atlantic, only a few venturesome land creatures, mostly insects and birds, had crossed the oceans and established themselves.
在哥伦布横跨大西洋航行之前，只有少数胆大的陆地动物(大部分是昆虫和鸟类)飞跃大洋，在美洲大陆建立了自己的领地。
"They will eat almost every vertebrate of the right size, but they mostly prefer birds and mammals," said USGS biologist Gordon Rodda, who co-authored the 350-page study.
“它们几乎会吃大小适中的每一类脊椎动物，但它们更偏爱吃禽类和哺乳动物。”曾合作撰写了350页研究报告的美国地质勘探局生物学家戈登·瑞达说。
The swan is mostly silent through its life. It floats quietly on the water, unable to sing sweet songs like most other birds.
天鹅一生大多数时间是安静的，它静静地漂浮在水面上，无法像大多数其他鸟类一样唱出甜美的歌声。
Meanwhile, western Europe has mostly escaped owing to a trend towards industrial poultry operations that reduce direct contact between people and birds.
西欧由于家禽养殖工业化的趋势减少了人与禽类直接的接触而在该病流行中得以幸免。
Although the impact on birds is clearly spreading, the impact on humans seems mostly limited to farmers and their families, who live and work with animals.
尽管其对禽类的影响正在明显扩散，但对人类的影响似乎主要限于那些与动物接触的农民及其家庭。
They eat mostly carrion, the eggs of ground-nesting birds, and berries.
它们大多吃腐肉，地上造巢鸟类的蛋，和浆果。
As the nature of output, mostly emerald green and red and yellow, and gradually, "jade" was the term by the name of the jade into birds.
由于自然界产出的翡翠多为绿色和红黄色，渐渐“翡翠”这一名词由鸟禽转为玉石的名称了。
Currently bird flu mostly afflicts humans who have been in close proximity to infected birds, so stay away from farms and poultry markets.
最近的禽流感主要感染那些跟受感染的鸟类较亲近的人，所以最好远离农场和家禽市场。
They feed mostly on animals like rats, bandicoots, and other rodents, but occasionally eat arboreal animals like birds and flying squirrels.
他们大多喜欢捕食老鼠，袋狸，和其他啮齿类动物，但偶尔吃像鸟一样，飞鼠树栖动物。
The swan is mostly silent through its life. It floats quietly on the water, unable to sing sweet songs like most other birds.
天鹅的一生都近乎安静，它静静地游荡在水面，不会像大多数其它鸟类一样引颈高歌。
The disease has been linked to the deaths of more than 140 people worldwide, mostly among Asian farm families who live in close contact to birds.
人感染性禽流感已经造成世界范围内140多人死亡，大部分发生在亚洲农场家庭。
Sea birds, mostly Piqueros (Peruvian Booby) flying over Guaape Norte Island in the coast off Peru, April 19, 2009.
2009年4月19日，大群海鸟飞过与秘鲁海岸遥相呼应的小岛上空。
Sea birds, mostly Piqueros (Peruvian Booby) flying over Guaape Norte Island in the coast off Peru, April 19, 2009.
2009年4月19日，大群海鸟飞过与秘鲁海岸遥相呼应的小岛上空。
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