从理论上讲，把非洲猎豹引进美国西部，可以让叉角羚重新回到生物学家所说的自然进化轨道上。
Importing African cheetahs to the western United States could, in theory, put the pronghorn back onto its natural evolutionary trajectory according to these biologists.
一些水产生物学家相信外围运河可以改善三角洲地区的生态系统，只有足够的水源才适合鱼类的生存。
Some fisheries biologists now believe building the Peripheral Canal could also improve the delta's ecosystem-as long as the fish were guaranteed adequate water.
别以为那种紫色的突起是它的眼睛——那些角是为了让其它生物(主要是跟它同等大小的生物)觉得它恐怖。
Do not mistake the purple protuberance for eyes - these are horns designed to make it look scary to other creatures (notably those of its own size).
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