biannual

a.一年两次的

beverage, bevy, bewail, beware, bewilder, bewildering, bewilderment, bewitch, bewitching, bewitchingly, beyond, beyond control, beyond dispute, beyond number, beyond question, beyond the limits, bezique, BFPO, bi(o)-, bi-, biannually, bias, bias binding, biased, bib, bible, bible-bashing, bible-punching, biblical, biblio-, bibliographer, bibliographical, bibliography, bibliophile, bibulous, bicameral, bicarb, bicarbonate, bicarbonate of soda, bicentenary, bicentennial,