点击下方单词,选择对的这个单词
名词
1. 石油;原油Petroleum is oil which is found under the surface of the earth or under the sea bed. Petrol and paraffin are obtained from petroleum.
1. a dark oil consisting mainly of hydrocarbons
Synonym: crude oilcruderock oilfossil oiloil
多通过句子记忆单词,而不是单独死记硬背。