英语语法分析

Mr. Rolston was born in the state of Virginia in 1932.

罗尔斯顿先生1932年出生在弗吉尼亚。

It is necessary that Rolston render the problem of the natural value again.

罗尔斯顿重新肯定自然界的内在价值问题的必要性。

Rolston argues that the duty of human beings to nature should be based on the objective value of nature itself.

罗尔斯顿主张把人们对大自然所负有的道德义务建立在大自然所具有的客观价值的基础之上。