Lee的小组使用一种反转录病毒将荧光基因植入狗胚胎成纤维细胞中，但是他们并不能控制这种反转录病毒植入基因的位置。
Lee's team used a retrovirus to transfer the fluorescent gene to dog fibroblast cells, but they could not control where the virus inserted the gene.
这两根螺旋纤维经常在相同螺旋圈数的位置同时发生螺旋旋向的改变，即螺旋反转。
The two helical nanofibers usually change helical senses (helical reversals) at the coil position of the same cycle number.
' W '字符的位置反转，以阐释数组中字符的顺序并不重要。
'W' character are reversed to illustrate that the order of characters in the array does not matter.
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