Tandem repeat is a kind of repeat which consists of two or more continuous copies 串联重复序列就是重复单元首尾相连,串接在一起的重复序列。
2.
He vessles in our body is more than one thousand kilometers long . . layed our vessles end to end , it encircles the equator four times 我们体内的血管有一千多公里长,将血管首尾相连其长度可以绕地球赤道4圈。