For example, you can rename a column, alter its length, specify a default value, and so on.

例如，可以重命名列，更改其长度，指定默认值等等。

youdao

Some believe its risky to alter Earths orbit, while others fear the jump will make the Gregorian calendar obsolete because of the length of Earths new orbit.

有些人认为改变地球轨道太危险，其他一些人则担心由于这一跳会使地球轨道变长，所以要改写公历。

youdao