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(biochemistry) a chemical substance that carries the genetic information, which is present in every cell and some viruses
脱氧核糖核酸
a form of energy that is carried by wires, cables, etc. and is used for lighting, heating, driving machines, etc.
电力
(biology) the slow and gradual development of living things throughout the history of the earth
演化
(physics) the universal force of attraction between any pair of objects with mass
地球引力
a global computer network that allows users around the world to communicate with each other and exchange information
因特网
an instrument that makes looking at tiny objects or organisms possible by enlarging them which is useful in scientific studies
显微镜
any of variation of antibiotics obtained from Penicillium moulds and used to treat or prevent a wide range of bacterial infections
青霉素
a communication device used for talking to people who are far away and also have a similar device
电话
a piece of equipment by which the far objects, particularly those in space, are made clearly visible
望远镜
an electronic device with a screen that receives television signals, on which we can watch programs
电视
a round object attached to a vehicle from its center, which allows a person can move the vehicle in different directions
轮
