Self-ignition accident by sour oil tank was analyzed, and the major reason was found to be thermal oxidation of iron sulfides generated from reaction of rust with hydrogen sulfide.

分析了铁的硫化物的危害特性 ，阐述了硫化物“自燃”产生的热量是造成油罐发生火灾事故的主要原因 ，并提出了相应的防护措施 ，提高油罐日常使用的安全可靠性。

youdao

It was a sour gel with a clear oil on top.

它就是——一堆酸酸的凝胶物上顶着一汪油。

youdao

In addition, if baked beans out of the oil, then that has changed, not only alcohol was reduced, and there will be astringent and sour.

此外，如果烘焙的豆子出油，则表示已经变质，不但香醇度降低，而且会出现涩味和酸味。

youdao

WATER-COOKED FISH is a Sichuan preparation of poached white fish and wilted cabbage in a sweet-sour broth slicked with chili oil.

WSJ: Danny Bowien's Catfish a la Sichuan | Slow Food Fast

It sells some and swaps the rest (mostly sour and heavy grades) with oil companies in exchange for better stuff shipped in from overseas.

FORBES: Strategic Oil Move

The majority new oil being developed are heavy, sour crude oils which have a high sulfur content, high viscosity, and high density.

FORBES: China's Not Going Green