下記の英文の訳し方がわかりません。
Or he may give what on face of it is a polished lecture, but one which takes for
granted that the lecturer can take for granted that the class takes for granted all
that he takes for granted.
この英文は長文問題集の本文の下線部訳の部分を抜き出しました。最後に全文を掲載しました。（12個の文があり、番号を付けました）
疑問が２つあり、また自作の和訳も書いてみました。長くなりますが、よろしくお願いします。
１）「but one which takes for granted」の「one」が何を指しているのか、わかりません。
２）「take for granted」が４回繰り返される英文の訳し方（意味の取り方）を教えて下さい。
[自作の和訳]
「あるいは、彼はその表面上は洗練された講義をするかもしれない。
しかし、その講師が当然だと思っている全てをそのクラスの学生も当然だと思っていることを、その講師も当然だと思っているとone も当然だと思っている。」
(1)In passing from school to college the student must prepare himself for the fact
that he may be going to a place in which he will receive the best education in
the world by the world’s worst teacher.
(2)His teachers at school had been trained to teach.
(3)At the university hardly any of those who teach will have been trained to teach.
(4)Their major concern will be about the advancement of knowledge.
(5)They may indeed like lecturing, just because they are bursting to express their
new ideas.
(6)But they may lecture in a way which has no relation to well-prepared lessons
which students have been accustomed to receive.
(7)The university teacher may turn his back on the class and excitedly write
formulas on the blackboard, all the time delivering his statements very fast
which are intended to give the class some clue to what he is so excited about.
(8)Or he may give what on face of it is a polished lecture, but one which takes for
granted that the lecturer can take for granted that the class takes for granted all
that he takes for granted.
(9)To be taught by such teachers is one of the greatest educational privileges in
the world.
(10)But in the odd forms of communication that occur in the lecture rooms of
universities, the chief responsibility is at the receiving end.
(11)That is why, rather paradoxically, university education is the most advanced
form of self-education.
(12)The student has to find out for himself the best way of listening to lectures.
お礼
なるほど、どうもありがとうございました。