The effect of this is that if an event handler implements a request-response operation, then only one instance of such an event handler may be active at any point in time.

此规定的结果是，如果某个事件处理程序实现了一个请求-响应操作，则在任何时间点，只能有一个此类事件处理程序的实例处于活动状态。

youdao

This command must be run while the defragmenter is active on a partition to show the defragment operation in progress.

必须在已启动碎片整理程序的分区上运行该命令，来查看正在进行的碎片整理操作。

youdao

The Global Volcanism Program has been in operation since 1968 and we look back at least 10, 000 years on a global scale—we call any volcano “active” if it has erupted in the last 10, 000 years.

全球火山活动机构自1968年以来一直在运行着，我们会追溯到全球范围内至少一万年以前——我们把任何在距今一万年以内喷发过的火山成为“活火山”。

youdao

Rather than wanting to go it alone, the new German government may well prove hyper-active in seeking international co-operation.

ECONOMIST: Germany

After completing a three-year enlistment on active duty at Fort Hood, Texas, I joined the U.S. Army Reserves in February 1987, and in February 1990, I was deployed for active duty with 279th Maintenance Company, Dallas, Texas, for Operation Desert Storm in Saudi Arabia.

WHITEHOUSE: The Gift to Make a Positive Change

Ecuador countered by releasing what purports to be Reyes's diary, which implicates disgraced former aides of Mr Correa in accepting FARC money but not the president himself. (Colombia reckons the document is fabricated.) Until it gets active co-operation from all its neighbours in fighting the FARC and other drug traffickers, Colombia will conclude that it must rely on American support.

ECONOMIST: Colombia and its neighbours