即使代码块内部指令也许是乱序执行的，也不会对使用了同步的其它线程造成任何影响。
Even though processing of statements within blocks may be out of order, this cannot matter to other threads employing synchronization.
即使代码块内部指令也许是乱序执行的，也不会对使用了同步的其它线程造成任何影响。
Even though processing of statements within blocks may be out of order, this cannot matter to other threads employing synchronization.
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