自然科學(xué)篇

There is little doubt that one reason why the number of amphibians is declining is that their habitats are being destroyed.

Do you think I just inherited a fortune?

The sophistication and complexity of these instruments has now increased to the point that they can produce almost any kind of sound.

Only recently did we learn that several stars are orbited by their own planets.

As you may recall, last time I mentioned that Robert was the first person to reach the North Pole.

How is your oral presentation coming along?

He snapped for no reason.
It's just the end of the semester pressure. He'll be his old self next week.

You should try to meet each other half way.

Over the history of the area, every time the river flooded, it would deposit a layer of sediment all through the floodplain.

Red and violet are at opposite ends of the spectrum.

I'm so frustrated. We are supposed to do our assignments for statistics on the computer. But the ones in the student center are always tied up.
I know what you mean. I'm looking forward to the day when I can afford to get my own.

His wife's complaints have finally stirred him into action.

The form of subliminal advertising is illegal in some countries in Europe.

Starfishes have what's called radio symmetry.

I have to admit the word "ethnography" scared me a little at first. It seems so technical.