以自然为后盾

back to nature───回归自然（牧场物语）

backed water───倒划；退缩；退回原来立场

balance of nature───[生态]生态平衡；[生态]自然平衡；自然生态平衡；自然均衡

by nature───天生地；生性

call of nature───自然的呼唤；上厕所

ease nature───大便；小便

force of nature───自然之力（歌曲名）

This is often backed up by the statement that a love of Nature is a foible of urbanized people who have no notion what Nature is really like.───支持此观念的是这样一种论调：热爱大自然是那些不清楚大自然什么样子的都市人的怪癖。