A constitutional amendment precludes any president from serving more than two terms.

宪法的一项修订条款规定任何总统不得连任两届以上。

《柯林斯英汉双解大词典》

"It would be a revolution to restore government to its constitutional basis." Gun owners worry that the Democratic administration will target the Second Amendment.

VOA: standard.2010.04.19

His government prepared for negotiations by pushing through a constitutional amendment setting out a legal framework for peace.

ECONOMIST: This time negotiations might eventually bring peace

It does not require a constitutional amendment and the ratification by preponderance of states here.

WHITEHOUSE: Press Briefings

In New Hampshire, the people should pass a constitutional amendment telling its high court just that.

FORBES: Fact and Comment