[00:00.00]Module4Bicycle [00:03.89]Invent [00:06.67]发明 [00:09.46]Paper [00:12.58]纸 [00:15.70]Important [00:19.49]重要的 [00:23.28]Printing [00:26.31]印刷术 [00:29.34]Print [00:32.65]印刷 [00:35.97]Bicycle [00:40.10]自行车