初级 1 - 材料与概念

a shiny grayish-white metal of high value that heat and electricity can move through it and is used in jewelry making, electronics, etc.

a hard material, usually made of minerals, and often used for building things

a sample, showing what the rest of the data is typically like

something such as a hammer, saw, etc. that is held in the hand and used for a specific job

something that is known to be true or real, especially when it can be proved

the application of scientific knowledge for practical purposes, especially in industry

anything that we can hear

a place where people do scientific experiments, manufacture drugs, etc.

a mild feeling of shock we have when something unusual happens

made of a hard material that forms the branches and trunks of trees

a light substance produced in a chemical process that can be formed into different shapes when heated

a valuable yellow-colored metal that is used for making jewelry