As influenza viruses pass from one person, or bird, to another, they normally pick up random changes in their genes because of errors in viral replication.
当流感病毒由一个人或一只鸟传给另一个人或鸟时，由于病毒复制错误，它们通常会带上基因中的随机变化。
Surfing is more akin to fly-fishing or bird-watching than to parachute jumping or alligator wrestling.
其实与跳伞和摔鳄相比，冲浪运动更像飞钓和观鸟。
Diseases that jump from wildlife to humans, such as Ebola or bird flu, are on the rise and may worsen as the climate changes。
从野生动物传到人类的一些疾病，比如埃博拉或者禽流感，有上升的势头，而且随着气候的变暖，这些疾病可能还会变得更严重。
Simply adding bird houses or bird feeders to your garden or lawn will introduce you to a variety of birds, many of which you may never have noticed.
仅仅只要在自家花园、草坪上添设一个鸟屋或者自动喂食器就能迎来不少鸟类访客，其中很多可能你并不认识。
这是你的猫还是你的鸟？
He could never bring himself to kill an animal or bird.
他绝不会杀害一个动物或一只小鸟。
Retired people usually find their pleasure in learning painting or calligraphy or bird raising.
退休的人通常利用学画、学书法或养鸟来找乐子。
The poultry industry throughout Asia has in recent years been subject to the shock of avian flu, or bird flu .
这几年来，全亚洲的家禽饲养业都笼罩在禽流感的惊恐下。
As a prospective parent, burying beetles find a dead animal, such as a mouse or bird, and roll the carcass into a ball.
作为准父母，埋葬虫找到一只死动物，例如一只老鼠或鸟儿，并将其尸体卷成一个球。
A tarantula will sometimes kill a small animal like a snake, frog, or bird, but crickets, beetles, and other insects are more typical prey.
狼蛛有时候会猎杀一些小型动物，譬如蛇、青蛙或者小鸟，但通常列在它食谱上面的则是蟋蟀、甲虫或者其它的一些昆虫。
In its most basic sense, birding, or bird watching, is the recreational hobby of observing species of wild birds, including their physical characteristics and behavior.
观鸟，在其最基本的意义上说，就是观察各种野鸟的形态特征和行为的一种休闲爱好。
When a territorial animal or bird intrudes on the territory of another creature of the same species, the latter will only perform some hostile gestures to warn off the intruder.
当地盘性的动物或鸟类侵入别的同类动物的领地时，后者只会做一些表示敌意的姿态以吓跑入侵者。
William Hammer of Augustana College found the new creature -- a four- to five-foot ornithischian or bird-hipped dinosaur that he believes is related to the fabrosaur or heterodontosaur.
奥古斯塔纳大学（Augustana College）的威廉·汉莫（William Hammer）发现了这种新的生物——一头四到五英尺的鸟臀目恐龙，他认为它与法布尔龙或畸齿龙有血缘关系。
Avian influenza, or "bird flu", is a contagious disease of animals caused by viruses that normally infect only birds and, less commonly, pigs.
禽流感为病毒诱发的动物传染病，通常仅感染鸟类，偶尔感染猪。
Avian influenza, or "bird flu", is a contagious disease of animals caused by viruses that normally infect only birds and, less commonly, pigs.
禽流感为病毒诱发的动物传染病，通常仅感染鸟类，偶尔感染猪。
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