Poor quality oil reserves(PQOR)is still an important resource.

低品位石油储量也是我国重要的石油资源。

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After cutting, the leaves are sun, or preferably shade dried on bamboo racks for about 3 days since distilling fresh leaves produces poor quality oil.

在收割之后，叶子直接放在太阳底下晒，或者能在荫凉处放在竹架上阴干3天是更好，因为蒸馏新鲜的叶子出产的精油品质差。

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If the input air quality is poor, can cause electromagnetic valve, the valve core oil pollution within the open mouth can't completely, the difficult open.

如果输入空气质量差，会造成电磁阀内产生油污，阀芯开启困难，阀口不能完全打开。

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The company said it had found relatively poor oil quality and a smaller reservoir size than expected at its Fulla prospect.

BBC: Oil company Faroe Petroleum abandons Shetland licence

But in a statement to the stock exchange on Friday, Faroe said extensive modelling since then had confirmed "relatively poor oil quality, smaller than expected resource size and limited access to infrastructure".

BBC: Oil company Faroe Petroleum abandons Shetland licence