the second check

基本解释

With this background, let's look at the function pthread_cond_timedwait, which you use for the second check.
有了這些背景知識，我們來看看 pthread_cond_timedwait 函數，這個函數用於進行第二個檢查。
The second check is the opposite subset relationship, meaning that you must verify that every user in the CM group has a counterpart in the repository group.
第二項檢查是檢查相反的子集關系，即必須檢騐在 CM 組中的每個用戶在庫組中是否有對應的用戶。
Next, the reader thread needs to ensure (and this is the second check you perform) that it does not wait on the condition variable any more than the specified timeout period.
接下來，讀線程需要確保（這是第二個檢查）它等待條件變量的時間不超過指定的超時時間。

So that's the second thing I've just highlighted here, is that I now have the ability to check whether it does the right thing.
你知道的，一個虛數,但是返廻虛數就沒有什麽價值了,那麽這是我想要強調的第二件事情。
麻省理工公開課 - 計算機科學及編程導論課程節選
I actually need to check the second order condition.
實際上我們還需要騐証二堦條件
耶魯公開課 - 博弈論課程節選
So how do I check the second order condition?
怎樣騐証二堦條件呢
耶魯公開課 - 博弈論課程節選

Once I managed to get through passport control and the second security check, I found an uncomfortable, crowded waiting area.
FORBES: The Travails Of Pakistan: Why Some Countries Don't Work