短語(yǔ)詞組短語(yǔ)it ain 't necessarily so 不必如此;并非如此;未必如此;本來(lái)不必這樣Gershwin It Ain 't Necessarily So 格什溫大可不必如此Gehwin It Ain 't Necessarily So 格什溫大可不必如此 返回 it ain't necessarily so