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。

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This grouping of locks helps programmers identity which ConcurrentHashMap object has the most serious JUC lock contentions.

这样的对锁的分组能够帮助程序员发现哪一个ConcurrentHashMap对象发生了最严重的锁竞争。

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Locks typically consist of a sliding, pivoted, or rotary bolt protected by a fixed or movable object.

锁通常由一个滑动，无所不能，或由一个旋转螺栓固定或可移动的物体的保护。

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Mr. Smit's conclusion: locks should be able to wrap around a stationary object, like a tree.

WSJ: Sjoerd Smit of Vanmoof: A Designer Spin on the Grandma Bike