P(gun)иԇx߷ּ֮x~R
иxҪ֪һc(din)I(y)~R@^Ǻy܌~R
1.иx~RƫڌI(y)|(zh)ԭ@ӣԇǞ˿ӢZ(y)ˮƽܷCڴW(xu)W(xu)(x)I(y)֪R(sh)˿ă(ni)ƫ،W(xu)g(sh)ķxҲĴW(xu)nĺ(jin)׃(ni)xȡڱ~.r(sh)?q)ڌW(xu)g(sh)~Roһ̶ȵҕǺ
2.иxČI(y)~Ry@c(din)ҲǺȻ?yn)иһTӢZ(y)ˮƽԇֲnjI(y)ԇy^ČI(y)~Rxд_(sh)(hu)F(xin)ǿă(ni)˼Ժز³(li)e(g)ӣIt should be obvious that cetaceans--whales, porpoises, and dolphins--are mammals@OGx}еһ(g)ԭ䡣@Ԓеcetaceanһ(g)^(gu)I(y)o(w)豳Ć~ֻҪJ(rn)R(sh)whalesdolphinsmammals֪cetaceanˮ()(dng)Dz(dng)@ஔ(dng)֪cetacean˼Ҫӛmammalwhaledolphin@N^õČI(y)~Rcetacean@NƧѾڱ@NDĆ~Ǻֵܲõ
P(gun)иԇx߷ּ֮x~RP(gun)£
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