常見(jiàn)例句雙語(yǔ)例句Nearly 80% of the oil-shale kerogen can be extracted as a toluene soluble bitumen with average molecular weight about 800.可從油頁(yè)巖中得到對(duì)有機(jī)質(zhì)約80％的瀝青抽出物（平均分子量約800）。 返回 oil-shale kerogen