1. 土壤;土地
    Soil is the substance on the surface of the earth in which plants grow.

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    e.g. We have the most fertile soil in Europe.
           我们拥有欧洲最肥沃的土地。
    e.g. ...regions with sandy soils.
           沙土地区

2. 国土;领土
    You can use soil in expressions like British soil to refer to a country's territory.

    e.g. The issue of foreign troops on Turkish soil is a sensitive one.
           在土耳其领土上驻扎外国军队这个问题非常敏感。

3. 弄脏;玷污
    If you soil something, you make it dirty.

    e.g. Young people don't want to do things that soil their hands...
           年轻人不愿做那些容易弄脏手的事情。
    e.g. He raised his eyes slightly as though her words might somehow soil him.
           他略略地抬了抬眼皮，仿佛她的话会不小心玷污了他。