核心问题
zero degree 与 zero degrees 哪个用法正确？
词典解答
两个用法都是正确的。例如：Water freezes at 0 degree/degrees. 水在零度结冰。但是：zero hour 或 zero-hour(部署的军事行动，攻击等的)开始时刻
zero plural (零复数) 见 fish, deer, sheep
zero relative(零关系词) 见 that, which, who, why
zero degree 与 zero degrees 哪个用法正确？
两个用法都是正确的。例如：Water freezes at 0 degree/degrees. 水在零度结冰。但是：zero hour 或 zero-hour(部署的军事行动，攻击等的)开始时刻
zero plural (零复数) 见 fish, deer, sheep
zero relative(零关系词) 见 that, which, who, why