Wheels leave grooves in a dirt road.
车轮在泥路上留下了凹痕。
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精选合辑 However each side of these shellac discs could only play about 3 or 4 minutes of music, and record companies realized that if they wanted a longer playing record, they would need a tougher material, one that could handle smaller grooves.
然而,这些虫胶光盘的每一面只能播放大约3或4分钟的音乐,唱片公司意识到,如果他们想要播放更长的时间,他们需要一种更坚韧的材料,可以承受较小的凹槽。