Translate the following sentence into Chinese. Today this harmonious relationship is threatened by man’s lack of foresight and planning, and by his carelessness and greed.
Translate the following sentence into Chinese.
“Stop the world, I want to get off,” is the way a popular song put man’s dilemma.
To pollute means to contaminate—to spoil something by introducing impurities, which make it unfit or unclean to use.
100 years ago man lived in harmony with nature. There weren't so many people then and their wants were fewer.
We literally live in and breathe pollution, and, not surprisingly, it is beginning to threaten our health, our happiness and our very civilization.
To see the very small things in the world, the microscope was developed.
Man, about to be buried in his own waste, is caught in a vicious cycle.
When they cannot see the sun, they use some special way to sense direction from the earth's magnetic field.
Translate the following sentence into Chinese. Another experiment is to put a little coil of wire on top of a pigeon's head and use an electric current from a small battery to make an electro-magnet.
Translate the following sentence into Chinese.
But pesticides, which decompose very slowly, accumulate in animals which feed on pest or their predators.
The ups and downs of life may seem to have no predictable plan.
When pigeons can see the sun, they use it as their main means of direction finding.
But the magnet-pigeons were in trouble that they started out in different directions and acted completely lost.
Translate the following sentence into Chinese. These ideas have been tested further by many different kinds of experiments.
They were just as good as the brass-pigeons in starting out in the right direction toward home.
Translate the following sentence into Chinese. The big question is how these work and where they are located in the bird's body.
In a number of experiments, both groups were taken away from home and let go.
Translate the following sentence into Chinese. Enough experiments have been done to decide that homing pigeons (and maybe other birds) seem to have a build-in clock.
Translate the following sentence into Chinese. One experiment is to put a film of gelatin over a pigeon's eyes to blur its vision.
The bald eagle, 12 species of hawks, and the pelican have been seriously reduced by chemicals.