The soil contains materials to keep the natural balance of the area.

这些泥土中含有保持该地区大自然平衡的物质。

We should appreciate the natural balance and pay more attention to the importance of wildlife protection.

我们应该意识到自然平衡的重要，更加注意野生动植物的保护。

Since prolonged exposure to antibiotics can result in antibiotic resistance, the antibiotics could also disrupt the natural balance of good and bad bacteria in your body.

由于长期接触抗生素会导致抗生素耐药性，抗生素也会破坏你体内有益菌和有害菌的自然平衡。

These could include bloodletting, which involved draining (sometimes concerningly large amounts of) blood in an attempt to remove poison or restore the body's natural balance.

这些可能包括放血，其中涉及排出（有时令人担忧的大量）血液以试图去除毒物或恢复身体的自然平衡。

Their tendency is not to overturn the natural balance of employments, but to render the work which is done in each as perfect and complete as possible.

他们的倾向不是要颠覆就业的自然平衡， 而是要使每项工作中完成的工作尽可能完美和完整。