Luyện nghe bài hát The Professor's Song

To "if you me your attention."
If you give me attention, I will tell you what I am.
I'm a brilliant - also something of a ham.
I have tried for degrees, in fact I've one of each;
Of course that makes me eminently to teach.
I understand the subject thoroughly, it's true,
And I see why it isn't all as obvious to you.
lecture is a masterpiece, meticulously planned,
Yet everybody tells me that I'm to understand,
And I can't why.

My are models of true art, you must agree,
And my is famous for it's legibility.
Take a like "minimum" (to choose a random word),
This was at a blackboard, and the professor wrote:

For anyone to say he cannot that, is absurd.
The anecdotes I get more amusing every year,
Though frankly, they go to prove is sometimes less than clear,
And all my explanations are lucid, I am sure,
Yet everybody tells me my lectures are obscure,
And I can't why.

Consider, for example, the force of gravity:
It's inversely proportional to - let me see -
It's r^3 - no, r^2 - no, it's r, I'll bet -
The sign in front is plus - or is it minus, I -
Well, anyway, is a force, of that there is no doubt.
All these formulas are trivial if you only think out.
Yet tell me, "i have memorized the whole year through
Ev'rything you've told us, but the I can't do."
And I can't why!