Therefore, the amount of time required for any particular memory access is completely unknown (if the memory is swapped out, who knows how long it will take).

因而，某一内存访问所需的时间是完全未知的(如果内存被换出，所需时间的长短是不可知的)。

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We've also presented and explained how to use several powerful new features, such as revalidation in memory and access to type information — something developers have been asking for for a long time.

我们还展示并解释了如何使用几个强大的新特性，例如内存中的重新验证以及对类型信息的访问——这些都是开发人员长期以来梦寐以求的特性。

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Why can't you access a 4 byte long variable in a single memory access on an unaligned address(i. e. not divisible by 4), as it's the case with aligned addresses?

为什么你不能访问一个4字节长的变量在未对齐地址（即不被4整除）一个内存访问，因为它与对齐地址的情况？

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