1. The oil is attacked by naturally occurring microbes which break it down.
原油受到了自然产生的分解油类物质的微生物的侵蚀。
2. After 19 May, strikes were occurring on a daily basis.
5月19日之后，每天都会发生罢工。
3. The chances of an error occurring in a computer program increase with the size of the program.
计算机程序越长，出错的概率也越大。
4. Oil is refined to remove naturally occurring impurities.
油经过提炼去除天然存在的杂质。
5. In - flight winds are occurring above a height of 150 meters.
飞行风是150米高度以上出现的风. |