本讲为2006年下半年新的教学内容，请对照讲义听声音！

Students(researcher/scholar) of Nature are not satisfied with guessing, but they observe, day after day, the changes which take place in an object; and they see many things which most people would fail to see. And thus they have found that the real difference between plants and animals lies in what they do, and not in what they seem to be.
We now know that about one fourth of all the kinds of seaweed are animals. A few years ago all of them were classed as plants. It was long supposed that the main difference between animals and plants was that the former could move about while the latter could not. But this difference will not hold good.(established)
How then are we to know whether a living object is a plant or an animal? plants can live on inorganic matter; they have the power of changing earth and air and water into substances which enter into and become a part of themselves. Animals can live only on what plants have already turned from inorganic to vegetable matter. Animals, although they need some inorganic food, cannot live on it alone.
All the food that keeps our bodies strong, or makes them grow, was once in the vegetable form. No bird nor fish nor other animal could ever have lived on this earth, if the plants had not come first and fitted it for the dwelling place of a higher order of beings.
plants are the true fairies that are forever working wonders around us. Their roots dig down into the earth and gather its treasures. Their leaves spread their broad surfaces to the air and take in its riches; and out of what they have thus gathered they produce the beautiful flowers, the delicious fruits, and the golden grain.

That arn computer well is important.
That we learn computer well is important.
I like the computer that my mum bought me on my birthday.
Three fourths
one third----two thirds
Human beings
I had learned 5000 words by the end of last year.
The plane had already taken off when I got to the airport.