The punch missed by a mile and the bigger boy crashed another blow into Billy's unprotected face.这一拳根本没有打中，于是那个大些的男孩又来了一拳，狠狠打在比利毫无防护的脸上。He showed him how to blow into the ivory mouthpiece.他给他演示如何吹奏象牙吹口乐器。You have to round your lips to blow into the flute.你得把嘴唇撮圆才可以吹这支笛子。When you blow into the instrument, the air vibrates the reed.你朝乐器里吹气时，气流会带动簧舌震动。