Health effects can only occur if someone is exposed to radiation, thus the main protective action someone can take is to prevent exposure.

只有当人暴露在辐射下，对健康的影响才会出现，因此人们要采取的主要保护措施就是防止暴露。

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Radon in our homes is the main source of exposure to ionizing radiation, and accounts for 50% of the public's exposure to naturally-occurring sources of radiation in many countries.

我们家中的氡是接触致电离辐射的主要来源，在许多国家中占大众接触自然发生的辐射源的50%。

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The main cause of infection in occupational Settings is exposure to HIV-infected blood via a percutaneous injury (i.e. from needles, instruments, bites which break the skin, etc.).

在职业环境中受到感染的主要原因是皮肤上的伤口(如由针，医疗器械，或叮咬而造成的皮肤破损)接触了被HIV病毒污染的血液。

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Like many of us, her main exposure to that city's rich culture is through friends, food and music.

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Despite the inflation risk, and the longer term likelihood of rising interest rates, Main Street investor exposure to low yielding bonds is likely to increase and become more concentrated, Dehn said.

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Now that the indoor use of organophosphates has been all but eliminated, the main sources are direct exposure to commercial agriculture and the traces found on supermarket produce.

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