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ڶиxҪ֪һc(din)I(y)~R@^Ǻy܌ģprofessional~Rһиx~RƫڌI(y)|(zh)ԭ@ӣиԇǞ˿ӢZˮƽܷCڴW(xu)W(xu)(x)I(y)֪Rknowledge˿.(ni)ƫ،W(xu)g(sh)ģacademicxҲĴW(xu)nĺ׃(ni)xȡڱ~ĕr(sh)?q)ڌW(xu)g(sh)~Roһ̶ȵҕǺģreasonableڶиxČI(y)~Ryޣlimited@c(din)ҲǺȻģnatural?yn)иһTӢZˮƽԇֲnjI(y)ԇy^ČI(y)~Rxд_(sh)(hu)F(xin)appearǿă(ni)ݣcontent˼Ժز³e(g)ӣIt should be obvious that cetaceans--whales, porpoises, and dolphins--are mammals@OGx}еһ(g)ԭ@Ԓеcetaceanһ(g)^I(y)o豳Ć~ֻҪJ(rn)Rwhalesdolphinsmammals֪cetaceanˮģ(dng)Dz(dng)@ஔ(dng)֪cetacean˼Ҫӛmammalwhaledolphin@N^õČI(y)~Rcetacean@NƧͣtypeѾڱ@NDĆ~Ǻֵܲõģunworthy
иx_(sh)Ҫ6ϵ~RҪӛõČI(y)~R^ҪѾƧČI(y)~R?yn)Dzиxģinvestigated(ni)
ʲôиx~RôҪP(gun)£
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