The natural song of the canary is loud and clear; and in their native groves the males, especially during the pairing season, pour forth their song with such ardour as sometimes to burst the delicate vessels of the throat.
Consequently the result of the haphazard pairing of a large number of these two groups of reproductive cells was to yield, according to the regular law of chance combination, the proportion 'PP, 2PN, INN, where P stands for the positive character and N for its absence or negative character - the pos
pairing与发音含义,同义词,反义词,翻译,刑和更多的