DNA复制是半保留复制。

DNA replication is semiconservative replication.

youdao

可以使用 -p 选项保留复制的每个文件和目录的所有者、权限和时间：$ cp -pr source destination。

You can use the -p option to preserve the ownership, permissions, and times for each file and directory you copy: $ cp -pr source destination.

youdao

现在，您没有检查正在处理的内容的有效性，而是将256个字节复制到了仅为128个字节的保留堆栈空间内。

Now, without checking the validity of what you're doing, you copy 256 bytes into a stack area reserved at only 128 bytes.

youdao