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a living thing such as a plant, animal, etc., especially a very small one that lives on its own
生物
a usually solid and hard substance that heat and electricity can move through, such as gold, iron, etc.
金属
a light substance produced in a chemical process that can be formed into different shapes when heated
塑料
a metallic chemical element with a silvery-gray appearance, widely used for making tools, steel, buildings, and various industrial products
铁
a shiny grayish-white metal of high value that heat and electricity can move through it and is used in jewelry making, electronics, etc.
银
to study a subject carefully and systematically to discover new facts or information about it
研究
a specific way or process of doing something, particularly an established or systematic one
方法
to be the first person who finds something or someplace that others did not know about
发现某事
something such as a hammer, saw, etc. that is held in the hand and used for a specific job
工具
scientific knowledge put into practice in a particular area, especially in industry
技术
the act of directing your attention and energy toward a particular thing or task
专注于某人或某事
a round object attached to a vehicle from its center, which allows a person can move the vehicle in different directions
轮
