back cross over

基本解释

Grab the back ends of the wrap and cross it over your back;
抓住布料后部的末端，交叉绕到背部；
You finally reach the door, open it and cross back over the threshold.
当你到达门口时，打开大门迈过门槛。
blog.sina.com.cn
20 p.m.: Border guards at the Bornholmer Strasse crossing could no longer hold back the crowds of East Germans who wanted to cross over into the West.
伯恩厚默边检站的边防兵再也挡不住涌向西德的东德人群了。

Cisco's newest gear is designed to effortlessly cross back and forth over those seams, innately sensing whether a digital packet is video, e-mail or an order and routing it only to the destination that can best use it.
FORBES: Technology
To find its coaches, the program took applications from any teachers in the system who were willing to cross over to the back of the classroom for a couple of years and teach colleagues instead of students.
NEWYORKER: Personal Best