64 bytes are required to hold a lock on an object that has no other locks held on it.
需要64个字节来持有某个对象上的锁，在这个对象上，没有持有其它锁。
The synchronization lock for the target object is released, but all other locks held by the thread are retained.
释放目标对象的同步锁，但是除此之外的其他锁依然由该线程持有。
The synchronization lock for the target object is released, but all other locks held by the thread are retained.
释放目标对象的同步锁，但是除此之外的其他锁依然由该线程持有。
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