naturally occurring是什么意思

naturally occurring是什么意思
naturally occurring是什么意思

naturally occurring是什么意思
naturally occurring
天然存在的；自然存在；自然发生；自然产生
双语例句
1. The oil is attacked by naturally occurring microbes which break it down.\x09
原油受到了自然产生的分解油类物质的微生物的侵蚀.
2. Oil is refined to remove naturally occurring impurities.\x09
油经过提炼去除天然存在的杂质.
3. Naturally occurring rock oil is referred to as crude oil or petroleum.\x09
天然形成之石油,我们称作原油或石油.