null词根的含义：none: 没有
null词根的解释:nothing 无
null词根的来源： 词根来源于nullus(=not any)。词例:
null词根的英语单词举例：
- annul 取消v.
- an 加强 + nul〔= null〕没有，无 → 变没有 → 取消
- The courts later found grounds to annul the results , after the king urged them to sort out the " mess " .
- 在国王敦促法庭收拾烂摊子后，法庭随后宣布废除选举结果。
- null 无效的；等于零的adj.
- What would be the null hypothesis , the kind of conjecture that you 'd make assuming nothing further .
- 什么是无效假设？那种你以为没什么可深究的臆测。
- nullification 无效；废弃n.
- null 没有，无 + ification 形成… → 无效；废弃
- How can a western president , like the french president , ask for nullification of iranian election results ?
- 一位像法国总统这样的西方总统怎么可以要求取消伊朗的选举结果？
- nullify 取消；废除v.
- null 没有，无 + ify 使… → 取消；废除
- These could nullify efforts by farmers to increase planting areas in response to the highest prices since the 2007-08 food crisis .
- 作为对农产品价格触及2007-08年粮食危机以来最高水平的回应，农民纷纷扩大了种植面积，而糟糕的天气状况可能会抵消这些努力。