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a Greek. an Englishman. a Chinese. an Italian.
He killed the guards and got out of the island. A god came to rescue him and took him away. His son came to rescue him and took him away. He made wings of wax and flew away from the island.
he flew too far. he flew too high. he fell to the ground. he was hit by a stone.
It will be broken. It will be made stronger. It will be filled with water. It wilt be tested by pilots.
he could not develop adequate power with his arms and legs. he knew nothing about the movement of the air. they were made of heavy metal. they were made of light feathers.
It will be broken. It will be made stronger. It will be filled with water. It wilt be tested by pilots.
a Greek. an Englishman. a Chinese. an Italian.
He killed the guards and got out of the island. A god came to rescue him and took him away. His son came to rescue him and took him away. He made wings of wax and flew away from the island.
he flew too far. he flew too high. he fell to the ground. he was hit by a stone.
It will be broken. It will be made stronger. It will be filled with water. It wilt be tested by pilots.
he could not raise enough money. his design was not scientific. he could not find enough copper. copper spheres could not be made as designed.
are often made is often made have often made has often made
96%H2，4%Air 73.5%H2，26.5%Air 26.5%H2，73.5%Air 72.5H2，26.5%Air
he could not raise enough money. his design was not scientific. he could not find enough copper. copper spheres could not be made as designed.
Both seamless mild steel and copper may be used for middle pressure steam "hpair" means high pressure air The feed piping of the boilers can be made of seamless mild steel All oil pipings are made of mild steel
he could not develop adequate power with his arms and legs. he knew nothing about the movement of the air. they were made of heavy metal. they were made of light feathers.
from water from the air in the sky from the soil from water, things in the soil and air and sunlight
the air will be too thin to support its wings. the air will become thicker. the air will exert pressure on it. the air will disappear in no tim
the chief engineer leaves the engineer room with the engine room log book at first releasing compressed air in the air receiver and closing the watertight door stopping all the running machineries and electric devices closing the quick-closing valves of all the oil tanks, stopping the boiler andreleasing gas
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