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We all know Archimedes (阿基米德) was a clever scientist. Using a good method, he the king that his crown was not made of pure gold. However, did you know that Archimedes was also a(n) ? In 215 BC, the Roman army invaded Archimedes' hometown. He turned himself away from math and began to invent some war machines. One of the machines was called the Archimedes' Claw. It was a big iron claw. The Roman army called the "ship beaters". It was so big that it must be controlled by almost all the of the whole country. But it could pick up enemy ships and throw them far into the sea.
Archimedes also invented the stone thrower. This machine could throw large stones at Roman ships from far away. The Romans were surprised the invention. They even a stone thrower and then made it for their own use.
Perhaps the greatest among all Archimedes' war machines was the "death ray". This was actually a set of mirrors. These mirrors could sunlight onto Roman ships and cause the wooden ships to catch fire. One ship after another sank into the sea. of Roman soldiers were killed in the fire. You can imagine their anxious eyes they saw the "death ray".
The iron claw, the stone thrower and the "death ray" all did a good job. They kept the Roman army away. What a mind Archimedes had! Using his great knowledge, he protected his home city.
