îIWWӍ
иx~R俼һֱԁDZ^ܠhԒ}ЩJиx~R俼ҪӢZļˮƽЩ˄tJиx~ԽԽ@ɷNe`ġ҂Ԕ˽иx~RЌI~RĜʂϣ
иxҪ֪һcI~R@^Ǻy܌~R
1.иx~RƫڌI|ԭ@ӣиԇǞ˿ӢZˮƽܷCڴWWI֪R˿ăƫ،WgķxҲĴWnĺ׃xȡڱ~ĕrڌWg~
2.иxČI~Ry@cҲǺȻиһTӢZˮƽԇֲnjIԇy^ČI~Rxд_Fǿă˼Ժز³eӣIt should be obvious that cetaceans--whales, porpoises, and dolphins--are mammals@OGx}еһԭ@Ԓеcetaceanһ^Io豳Ć~ֻҪJRwhalesdolphinsmammals֪cetaceanˮ()@ஔ֪cetacean˼ˡҪӛmammalwhaledolphin@N^õČI~Rcetacean@NƧѾڱ@NDĆ~Ǻֵܲõ
2.иxČI~Ry@cҲǺȻиһTӢZˮƽԇֲnjIԇy^ČI~Rxд_Fǿă˼Ժز³eӣIt should be obvious that cetaceans--whales, porpoises, and dolphins--are mammals@OGx}еһԭ@Ԓеcetaceanһ^Io豳Ć~ֻҪJRwhalesdolphinsmammals֪cetaceanˮ()@ஔ֪cetacean˼ˡҪӛmammalwhaledolphin@N^õČI~Rcetacean@NƧѾڱ@NDĆ~Ǻֵܲõ