The system has the ability to run more than one program at the same time.

该系统能够同时运行一个以上的程序。

《牛津词典》

In each case, I ran a simple program that measured the run time of a loop calling a method 10,000,000 times, calling both a synchronized and an unsynchronized version, and compared the results.

在每一个实例下，我运行一个简单的程序，测定循环调用一个方法10,000,000次所需的运行时间，我调用了同步和非同步两个版本，并比较了结果。

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Even better, you can run your program for a long, long time, ensuring that you trigger many garbage collections, more accurately amortizing the allocation and garbage collection cost.

更好一些的话，您可以长时间运行您的程序，这可以保证触发许多垃圾收集，从而更精确地分摊垃圾收集的成本。

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