在刚引入JIT的时候，为了确保GC操作的安全，我不得不编写代码，让垃圾回收器停止（VM）系统内的所有线程。
When I introduced the JIT, I had to write code to allow the garbage collector to stop all threads in the system so it could safely GC.
安全设计周全，双手操作，设有紧急停止按钮及上下点动功能。
Safety designed, using both hands to operate, with emergency stop button and jog up and down function.
安全设计，采用双手操作，设有紧急停止按钮及上下点动功能。
Safety designed, using both hands to operate, with emergency stop button jog up down function.
安全设计，采用双手操作，设有紧急停止按钮及上下点动功能。
Safety designed, using both hands to operate, with emergency stop button and jog up and down function.
安全设计，采用双手操作，设有紧急停止按钮及上下点动功能。
Safety designed, using both hands to operate, with emergency stop button and jog up and down function.
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