When people pour old motor oil on the ground or throw it in the garbage, it pollutes the environment.
当人们把旧机油倒在地上或扔到垃圾里，它会污染环境。
Keep deck clean, no garbage and oil stains.
保持甲板清洁，无垃圾、油迹。
PAHs are a group of chemicals that are formed the incomplete burning of coal, oil and gas, garbage, or other organic substances.
多环芳烃是一组化学物质，他们是由未经完全燃烧的煤。油和气。垃圾。或是其它有机物质形成的。
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