慢速英语:澳大利亚科学家推出一种望远镜来观察地下深处

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dimensional – adj. of or related to a measurement in any one direction

interior – n. an inner part or area

mobile – adj. being moved; changeable in purpose

virtually – adv. existing or occurring on computers or the internet

seismic – adj. of, relating to, or caused by earthquakes

battery – n. something that produces electric current