这间公司男女员工的比例是3:7。

The male-to-female employee ___ratio in this company is 3:7.

这个班级的男女比例是2比1。

The ___ratio of boys to girls in this class is 2 to 1.

这个班级的男女比例是2:1。

The ___ratio of boys to girls in this class is 2:1.