For a growing number of species, mostly birds, the answer is yes.
对于日益增多的物种来说,特别是大部分鸟类,答案是正确的。
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。
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