There was no change in ETR of each source rock interval with the increase of depth in the oil window, which indicated ETR had excellent thermic stability.

在生油窗内同一套烃源岩样品的ETR随深度（成熟度）增加无明显变化，具有很好的热稳定性；

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In the early subsiding region, both the Kongdian Formation (E k) and the Shahejie Formation fall into oil window, but preservation of the expulsed oil and gas is a problem.

早期沉降型埋藏区地层埋藏较深，孔店组和沙三段均具有生排烃能力，但早期排出的烃存在一个保存问题；

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After operation, observe the oil level in the oil window, preferably at the intermediate mark. Slightly below or beyond the mark will not affect the normal operation of the gear reducer.

运行后观察油窗中的油位在油窗中间刻线处为宜，略高或略底均不会影响减速机的正常运行。

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After a battery fire and several other mishaps over the past few days, two separate flights reported a cracked cockpit window and an oil leak on Friday.

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There will be a very small window of opportunity to buy oil at lower prices before the end of the year.

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As for random window cracks and fuel and oil leaks, Boeing can solve these kinds of problems without much difficulty, he says.

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