n. 活塞；[机] 旋阀
stopcock /ˈstɒpˌkɒk/
可数名词 A stopcock is a faucet on a pipe, which you turn in order to allow something to pass through the pipe or to stop it from passing through. 管闩; 旋塞阀
旋阀
转闩
At this point in the conversation, however, most developers will stop, cock their head to one side, and ask (quite rightfully), "But... why?"
然而，当话题讨论到这些问题的时候，大多数开发者都会停下来，向一侧仰着头，非常认真的问道“可是……这样的互操作对我们来说究竟有什么用？”