by reason that

因为…，由于…

by courtesy of, by error, by far, by force, by hand, by heart, by instinct, by invitation, by itself, by leaps and bounds, by little and little, by means of, by mistake, by name, by nature, by night, by no means, by oneself, by pressed for, by reason of, by request, by the moment, by the name of, by the same token, by the standards of, by the way, by turns, by virtue of, by way of, by worthy of, by yourself, by-election, by-law, by-play, by-product, by-road, bye, bye-bye, bye-byes, bygone,