nature
1. human nature（人性、人情），good nature（仁爱、好脾气），ill nature（不友善、坏脾气）和second nature（第二天性、习惯）各种表达方式前面都没有the或a，也都没有复数形式...natures。但animal nature（兽性），moral nature（道德性）和rational nature（理性）各种表达方式前面都有the。
2.下面三句意思相同：
- Love of music has become second nature with him.
- Love of music has become second nature to him.
- Love of music has become second nature in him.
3.注意of a different nature，of a literary nature，of a religious nature等表达方式里有a。
4.比较下面两句：
1.To know Nature is to love her.（这句把大自然人格化。）
2.To know nature is to love it.
