子线程（Sub Thread）：在主线程中又创建了的线程
基于16个网页-相关网页
sub-thread 子线程
Stop sub-thread 停止线程
Start sub-thread 子线程开始
Resume sub-thread 继续线程
Suspend sub-thread 挂起线程
sub-thread page template 子线索页面模版
Their cases share a common thread -- repeated concussions, sub-concussive blows to the head, or both.
CNN: NFL wants players' suit over concussions dismissed
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