我们称o为加性单位元素。

We call O the additive identity.

youdao

显示资料行的资料型别所允许的大小(以位元组为单位)。

Shows the size in bytes allowed by column's data type.

youdao

显示资料行的资料型别所允许的大小(以位元组为单位)。

Shows the size in bytes allowed by column's data type.

youdao