The global lock cache feeds the per-thread lock caches.

全局锁缓存将其内容提供给单线程锁缓存。

youdao

Using ThreadLocal makes sense when you need to store variable instances on a per-thread basis.

当您需要以线程为单位存储变量实例时，使用 ThreadLocal 很有意义。

youdao

Also, because the references to the per-thread values are stored in the owning thread object, when the thread gets garbage collected, so can its per-thread values.

而且，因为每线程值的引用被存储在自已的Thread对象中，所以当对Thread进行垃圾回收时，也能对该Thread的每线程值进行垃圾回收。

youdao

Thanks to an engineer's trick called "wave division multiplexing, " a single fiber-optic thread can carry upwards of 10 trillion bits per second.

FORBES: Digital Rules