average length

• 平均长度

average length的用法和样例：

例句

1. If this joint length ratio is greater than 10, the rock is likely to be blocky.
   采用切割法找到所有组成岩体的任何块体，基于裂隙的平均长度与平均间距，引进产生三维裂隙多边形的统计方法。
2. Typically, most music videos run for about 3 to 4 minutes, the average length of a pop song.
   绝大多数的音乐录影带只播放三到四分钟，基本上是流行歌曲的平均长度。