key-off

基本解释

The key trade-off between the two methods is ease of use versus granularity of control.
两种方法的权衡实际就是易用性和控制粒度的权衡。
Extracting pose information of welds is key technology of off-line programming in graphic environment. Path planning of arc welding robot can be made after pose information of welds is extracted.
焊缝位姿信息的提取是实现图形环境下离线编程的关键，在获得待焊工件的焊缝位姿信息后，才能进行弧焊机器人工作路径规划。
She spent hours playing her old, off-key piano.
她许多时候都在弹她那架又旧变调的钢琴。

Kerry,during a recent trip to Afghanistan and Pakistan, is credited with playing a key role in convincing Afghan President Hamid Karzai to enter a run-off election, following wide-spread corruption that tainted the initial contest in August.

While Rosen's voice echoes Corgan's, the band's signature off-kilter (at times off-key) melodies are more likely to bring to mind Flaming Lips frontman Wayne Coyne.
NPR: Falcon: 'The Sandfighter'
Nowadays a moderately skilled hacker needs only a couple of minutes to crack its key with an off-the-shelf wireless card.
FORBES: Magazine Article
Engaging with your key audiences during off-season periods can provide them with time to think more advantageously about their needs and how your products and services can help deliver their desired results.
FORBES: To Every Marketing Plan, There Is a Season