A trap is one of the five essential requisites for a commercial accumulation of oil or gas.

圈闭是石油和天然气形成商业性聚集的五大要素之一。

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Cultural phenomena, including the commercial and cultural duality, it should be the accumulation of human culture that it is a part of.

文化现象，包含着商业和文化的双重性，应该说它属于人类文化积累的一个部分。

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The branch of economic geology that relates to the origin, migration and accumulation of oil and gas, and to the discovery of commercial deposits.

石油地质学是经济地质学的一个分支，它涉及油气的起源、运移和聚集，以及商业沉积的发现。

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His fortunes were founded on real estate speculation and the accumulation of commercial television channels which gave him a virtual monopoly over commercial TV broadcasting in Italy.

BBC: NEWS | Europe | Corruption claims stalk Berlusconi

There was massive inflation in asset prices, especially in commercial and residential property, and a hideous and dangerous explosion of the accumulation of debt: an analysis by McKinsey, which I've mentioned here many times before, shows that the aggregate of household, business, government and bank debt increased from less than 200% of GDP in 1987 to a record 500% of GDP in 2008, and hasn't really fallen since.

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