1、John explained away his unfinished task by showing his boss a certificate for sick leave.
2、If, for some reason, you have no choice but to move on to something else, try to at least put away the unfinished task and clean up after yourself.
3、When the count of unfinished tasks drops to zero, join() unblocks.
4、The count of unfinished tasks goes up whenever an item is added to the queue.
5、If I let my email go for a few days, I feel like I'm under a pile of nagging, unfinished tasks, and it drains my energy.
