Read Edit View history 合成石油 héchéngshíyóu synthetic oil Origin Definitions Defs Strokes Stroke Words Sentences Sents created sense approved 合成石油 · héchéngshíyóu · synthetic oil 2026/03/04 合成石油 héchéngshíyóu synthetic oil synthetic oil 由于资源匮乏，他们开始研发合成石油。 created sense Mar 4, 2026, 02:25 AM