If the reverse operation is needed, then the block must be erased (to reset all bits to the one state).

如果需要撤销操作，那么必须擦除整个块(将所有数据重置回状态1)。

youdao

You can use a prefixed namespace in your query to retrieve elements that have a default namespace in your documents, as well as perform the reverse operation.

可以在查询中使用一个带前缀的名称空间来检索文档中有默认名称空间的元素，或者进行相反的操作。

youdao

During the third quarter, the company continued what it described as an aggressive drill campaign with 13 core and 10 reverse circulation rigs in operation.

FORBES: Kinross: Tasiast-Expansion Commitment To Hit $1 Billion By Year-End; Production Set For 2014

But Alibaba failed to reverse the ongoing decline in those services, and is reportedly preparing to return the entire Yahoo China operation to the US company, according to Chinese media reports.

FORBES: Yahoo Shutters China Email��Withdrawal Looms