Avoid exposure to heavy metals like lead.

避免与重金属铅接触。

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This helps to avoid exposure to infection.

这样有利于避免接触到传染源。

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Even close to a designated smoking area, you can avoid exposure by being upwind.

即使与指定的吸烟区域很接近，你仍能因为处于上风向而避免接触。

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Many devotees of organic foods purchase them in order to avoid exposure to harmful levels of pesticides.

FORBES: Is Organic Agriculture "Affluent Narcissism?"

Serb armour, now hidden or immobilised to avoid exposure to air strikes, would presumably re-emerge and might unleash as much firepower as it could before being destroyed or routed.

ECONOMIST: The ground-war scenario

Avoid exposure to secondhand smoke.

CNN: Sore throat