求翻译：从上个世纪50年代，石油气田的产量一直呈上升趋势，是什么意思？

From the 1950s of the last century, liquefied petroleum gas field production has been an upward trend,

From the last century, liquefied petroleum gas (LPG) 50s, the production has been on a steady upward trend.

From on century 50's, the petroleum natural gas field output assumes the trend of escalation continuously,

From the 50 's of the last century, production of oil and gas field has been an upward trend,

At present the petroleum is the modern industry society most important raw material.The overwhelming majority transport means use petroleum actuation, the petroleum also is used in addition for to generate electricity, it also is chemical industry important raw material.Many countries have combat re