biorhythm

n any of the recurring cycles of physical, emotional and intellectual activity said to affect human behaviour 生物节律（据说可影响人类行为的体力、感情和智力活动的循环）.

binnacle, binoculars, binomial, biochemical, biochemist, biochemistry, biodegradable, biographer, biographic, -ical, biography, biological, biological control, biological warfare (also germ warfare), biologically, biologist, biology, biomedical, bionic, bionics, biopsy, bioscope, biotechnology, bipartisan, bipartite, biped, biplane, birch, bird, bird of paradise, bird of passage, bird of prey, bird sanctuary, bird-bath, bird-song, bird-table, bird-watcher, birdbrained, birdcage wire, birdie, birdlime (also lime),