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【geology】地質學：petroleum 石油
petroleum [pəˋtrolɪəm] n. 石油 ( = oil)
Petroleum is dark thick oil obtained from under the ground, from which various substances including petrol, paraffin and diesel oil are produced.

gusher [ˋgʌʃɚ] n. 自噴油井
Gusher is an oil well from which oil flows without the use of a pump.

derrick [ˋdɛrɪk] n. 井架；鑽塔
A derrick is a framework over an oil well or borehole, to hold the drilling machinery.

seep [sip] n. 儲油層
Oil and gas seeps are natural springs where liquid and gaseous hydrocarbons leak out of the ground.

fault [fɔlt] n. 斷層
A fault is a large crack in the surface of the earth.