The most important change, however, was the shift from diets based exclusively on food collection to those based to varying degrees on food production.句中 to varying degrees 是什么成分,位置可以变动吗?
...s thigh.请问老师,his thumb parallel to his thigh是独立主格结构吗?名词his thumb + 形容词parallel,表示伴随相当于并列句 The back of his hand was at right angles to his
body, and his thumb was parallel to his thigh.
Because the diamond is the hardess naturally substance, it is used in industry for to cut, grinding, and boring other hard materials. 怀疑: naturally 难道没错吗?