And hide all this logic in a XmlHttpRequest service, of course, and support multiple concurrent requests.
将这些逻辑抽象并隐藏在XmlHttpRequest服务中，当然要支持多个并发的请求。
2
It is possible to encapsulate very complex logic without worry about about concurrent accesses.
可以可能地封装十分复杂的逻辑，而不需要担心并行访问。
3
This book studies the relationship between automata and monadic second-order logic, focusing on classes of automata that describe the concurrent behavior of distributed systems.