biyearlies

[ba?'j??l?; -'j??-]
biyearly
[bai'j?:li; bai'ji?li]
adj.
每兩年一次的
一年兩次的
adv.
每兩年一次地
一年兩次地[此義用semiyearly, semiannual(ly)或biannual(ly)為好]