The API recognizes that synchronous data sources are both necessary and common. The application should not be forced to always accept the performance cost of asynchronous scheduling simply because that's the only option provided. At the same time, mixing sync and async processing can be dangerous. Synchronous paths should always be an option and should always be explicit.
多年前，我把自己在创作工作中的经验与对产品设计的态度，总结为十条原则（十诫）。我认为它们在今天依然有效：
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We’ve adding Pointing Stick options to Mouse & Touchpad settings and a new setting for Touchpad drag lock. Plus we improved screen reader accessibility.
"Launching radioactive material through the Earth's atmosphere brings safety concerns. You have to have a special license to do that, but it is not insurmountable," says Dr Simeon Barber, planetary science specialist at the Open University.