advanced - modern or recently developed, add - to put together, adopt - to start to use something, calculation - the process of using numbers, for example in mathematics or physics (adding, division, etc), confirm  - to say or to prove that something is correct, correspond - to be similar to something else, describe - to say what something is like, extraordinary  - unusual or strange, formulate - to express ideas choosing words carefully, introduce - to start to use something for the first time, investigate - to examine carefully, refer to  - to mention somebody or something, relationship  - the way in which things are connected, remain - to be still in the same state,

Inventions and discoveries part 3




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