如果字段是值类型的，则对该字段执行逐位复制。

If the field is a value type, a bit-by-bit copy of the field is performed.

youdao

克隆意味着精确复制(一位一位复制)，本例中不是这样的。

Cloning implies an exact copy (bit for bit), which is not the case here.

youdao

Sendfile(2)是一种避免缓冲区复制开销的技术，并且它直接将数据位从文件系统转移到网络。

Sendfile (2) is a technique that avoids buffer copy overhead, and it directly pushes bits from the file system onto the network.

youdao