double back

基本解释

It is been the first double back flip in a wheelchair, it's being called that.
这是他在轮椅上第一次做出双后空翻。
The 18-year-old was determined to do a double back flip in his wheelchair, and he did it.
这名18岁的女男子决心在轮椅上进行两次后空翻，他确实做到了。
Sceptre’s six-night $749 Castle Hotels package, which used to fly into Dublin and depart from Shannon, now begins and ends in Dublin, requiring travelers to double back.
价值 749美元塞珀特的六夜城堡酒店组团游，也因为由过去从都柏林开始到香农结束，现在改成了都在都柏林，会需要旅客顺原路返回。

Concerns about a double-dip recession were back in the news this week.
I just come back with my black coffee and my double espresso mocha latte skinny frothed, except it isn't espresso.
我回到桌位上，双手拿着我的黑咖啡,和一杯双倍浓度无咖啡因少泡沫的穆哈咖啡，其实不是无咖啡因的。
耶鲁公开课 - 心理学导论课程节选
It's a double stranded circular piece of DNA, meaning that the 3', 5'ends that hang off are joined back together again to form a continuous loop.
它是双链环状DNA,它的3'末端和5'末端首尾相连,构成一种连续环状结构
耶鲁公开课 - 生物医学工程探索课程节选

Specifically, the Act provides an independent cause of action for a whistle-blower who has experienced employer retaliation, which allows the whistle-blower to recover double back pay with interest and attorney fees.
FORBES: The Bounty Hunter In All of Us

to go back in the opposite direction (esp in the phrase double back on one's tracks) ("double back on one's tracks")