有时,and 和 or 必要翻译
Most Americans have great vigor and enthusiasm.
They have courage and do not give in easily.
Foreigners sometimes complain, however , that they have little interest in or knowledge of the outside world.
Promote physical culture and build up the people's health .
Never get on or off the bus before it comes to a standstill
They are prepared to take the initiative , even when there is a risk in doing so .
He is an Englishman , and not an American .
They have a wide knowledge of everyday things , and a keen interest in their particular city and state.
Is the sole aim of most Americans to make money and possess luxuries which could be called excessive?
The use of bacteriological weapons is a clear violation of international law.
The individual American is generous, but the American nation is hard.
If you like the books , you can take them with you .
They pride themselves on their independence , their right to make up their own minds.
When the Constitution was written in 1787, there were only 13 states.
What scenic spots are there in Shanghai ?
Their skyscrapers , bridges and dams often have a splendor which matches in beauty and scales the country's natural wonders.
ANIMAL AND MACHINE
The body of an animal may well be compared with some machine like a locomotive engine. Indeed ,the animal body is a machine . It is a machine composed of many parts , each part doing some particular kind of work for which a particular kind of structure fits it; and all the parts are dependent on each other and work together for the accomplishment of the total business of the machine. The locomotive must be provided with fuel , such as coal or wood or other combustible substance , the consumption of which furnishes the force or energy of the machine . The animal body must be provided with fuel , which is called food , which furnished similarly the energy of the animal . Oxygen must be provided for the combustion of the fuel in the locomotive and of the food in the body . The locomotive is composed of special parts : the fire box for the reception and combustion of fuel ; the steam pipes for the carriage of steam ; the wheels for locomotion; the smokestack for throwing off waste. The animal body is similarly composed of parts: the alimentary canal for the reception and assimilation of food ; the excretory organs for the throwing off waste matter ; the arteries and veins for the carriage of oxygen and food-holding blood; the legs of wings for locomotion.