What does Deuteronomy 25:7 mean?

And if the man like not to take his brother’s wife, then his brother’s wife shall go up to the gate unto the elders, and say, My husband’s brother refuseth to raise up unto his brother a name in Israel; he will not perform the duty of a husband’s brother unto me.

And if the man like not to take his brother’s wife, then let his brother’s wife go up to the gate unto the elders, and say, My husband’s brother refuseth to raise up unto his brother a name in Israel, he will not perform the duty of my husband’s brother.

And if the man like not to take his brother’s wife, then his brother’s wife shall go up to the gate unto the elders, and say, My husband’s brother refuseth to raise up unto his brother a name in Israel; he will not perform the duty of a husband’s brother unto me.

But if the man says he will not take his brother's wife, then let the wife go to the responsible men of the town, and say, My husband's brother will not keep his brother's name living in Israel; he will not do what it is right for a husband's brother to do.

`And if the man doth not delight to take his brother's wife, then hath his brother's wife gone up to the gate, unto the elders, and said, My husband's brother is refusing to raise up to his brother a name in Israel; he hath not been willing to perform the duty of my husband's brother;

But if he will not take his brother's wife, who by law belongeth to him, the woman shall go to the gate of the city, and call upon the ancients, and say: My husband's brother refuseth to raise up his brother's name in Israel: and will not take me to wife.

But if the man like not to take his brother's wife, his brother's wife shall go up to the gate unto the elders, and say, My husband's brother refuseth to raise up unto his brother a name in Israel: he will not perform for me the duty of a husband's brother.