再请教几个翻译问题

sunlitpalm

1.Block-oriented device file Character-oriented device file
怎样理解orient的意思
2.When a file is created by a process, its owner ID is the UID of the process. Its owner user group ID can be either the process group ID of the creator process or the user group ID of the parent directory, depending on the value of the sgid flag of the parent directory.
怎么可能会是父目录的GID呢？
3. In some casesend-of-file, empty pipe, and so on the kernel does not succeed in reading all count bytes.
4.noninterleaved and interleaved kernel control paths
5.While it appears to each process that it has access to a private address space, there are times when part of the address space is shared among processes. In some cases, this sharing is explicitly requested by processes; in others, it is done automatically by the kernel to reduce memory usage.
6.When the outcome of a computation depends on how two or more processes are scheduled, the code is incorrect. We say that there is a race condition.
race condition是什么意思？


谢谢。