bikes/baɪk/名词自行车,单车,脚踏车My youngest child is learning to ride a bike.我最小的孩子正在学骑自行车。/baɪk/动词骑自行车去We biked a copy over to Greg at the BBC.我们骑摩托车给英国广播公司的格雷格送了一份文件。想跟读,去练习