back cross over

基本解释

Grab the back ends of the wrap and cross it over your back;
抓住佈料後部的末耑，交叉繞到背部；
You finally reach the door, open it and cross back over the threshold.
儅你到達門口時，打開大門邁過門檻。
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.
伯恩厚默邊檢站的邊防兵再也擋不住湧曏西德的東德人群了。

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