The way cancellation works, from an application standpoint, is that when thread A no longer needs the work that thread B is performing, thread A calls pthread_cancel on thread B.
驻足点
from an application standpoint；从应用的驻足点来说。

这个和之前2012年学到的一个词很类似：from my point of view。from my view。主要是说明一个参考点的意思。

standpoint
*['stændpɒint]
n. 立场, 观点
<— 牛津现代英汉双解词典 —>
standpoint
/ˈstændpɔɪnt; `stændˌpɔɪnt/ n position from which things are seen and opinions are formed; point of view 立场; 立脚点; 看问题的角度: from the standpoint of the customer 从顾客的角度来说.