Two Belarusian Men Invent Simple Prosthetic Arm(翻译)

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prosthetic – n. an artificial device that replaces a missing or injured part of the body

range – n. a place where people can practice shooting guns

saw – n. a tool that has a blade with sharp teeth and that is used to cut through wood, metal and other hard material

maintenance – n. the act of maintaining something or someone, such as the act of keeping property or equipment in good condition by making repairs, correcting problems, etc.

3-D – adj. having the quality of being three-dimensional

patent – n. an official document that gives a person or company the right to be the only one that makes or sells a product for a certain period of time

chain saw – n. a tool that cuts wood with a circular chain that is driven by a motor and made up of many connected sharp metal teeth

tackle – v. to deal with (something difficult)