英汉例句雙語例句But competitors though they may be, grizzly bears (being of the brown bear subspecies Ursus arctos horribilis) are such close relatives that the two species can produce fertile offspring.盡琯是競爭對手，但灰熊是近親，這兩個物種很可能會産生後代。ursus arctos horribilis更多例句