因为所有科学道理
16:59, 27 October 2011
The 8-foot-long Japanese sea lion—an even larger cousin of ...
Until as recently as the early 1800s, the passenger pigeon ...
(In a bird's wing) each of the smaller feathers covering ...
The quagga (Equus quagga quagga) is an extinct subspecies ...
The Carolina parakeet was once the only species of parrot ...
Honey bees (Apis mellifera) are a subset of bees in the ...
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