bacterium

n.细菌

backstage, backstroke, backtrack, backup, backward, backward(s), backwardness, backwards, backwards (also backward), backwash, backwater, backwoods, backwoodsman, backyard, bacon, bacteria, bacterial, bactericidal, bacteriologist, bacteriology, bad, bad debt, bad lands, bad language, bad-mouth, bad-tempered, baddy, bade, badge, badger, badinage, badly, badminton, badness, baffle, bafflement, baffling, BAFTA, bag, bagatelle,