单词	biannual
释义	bi·an·nu·al (bī-ăny-əl) adj. 1. Occurring twice each year; semiannual. 2. Occurring every two years; biennial. bi·annu·al·ly adv.
随便看	wry wryly wryneck wryness WS WSW wt. WTC WTF WTO Wu wudn't Wuhan Wuhu wulfenite wunderkind Wuppertal wurst wurtzite wushu wu shu Wusih wuss wussy Wutai Shan

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