hole: n.1.洞，穴，孔；(衣服等上的)破洞；伤口；漏洞；窝，坑；水流的深凹处，(河道的)缓流洼。2.(兽的)洞穴，窝巢；陋屋，狭小阴暗的地方[房子]；监狱中的隔离牢房。3.〔口语〕陷阱；绝境。4.缺陷，缺点。5.【物理学】空穴，空子。6.高尔夫球的穴；高尔夫球得分。7.〔美国〕铁路的支线。8.大型飞弹地下井。9.〔美国〕小湾，小港。短语和例子a hole in one's co
Bass flute is made of a kind of special material , the sound of which is very gentle . it is two sound holes and one model hole more than ordinary flute 低音笛子音色浑厚柔和，由玻璃钢制作而成，它比一般笛子多两个音孔，多一个模孔。
