Invocation concurrency: The number of threads of execution concurrently invoking a service or method.

调用并发性：并发调用服务或方法时执行的线程数。

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But getting used to this new model of execution can be a bit awkward, if only because it represents an entirely different way of thinking about concurrency.

但是，习惯这种新的执行模型可能有点儿困难，因为这是一种全新的并发性考虑方式。

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Robust concurrency and asynchronous execution support.

健壮的并发和同步执行支持。

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