If you accidentally swallow more than used for brushing, seek professional assistance or contact poison control center immediately.

如果您不小心吞下过多牙膏，寻求专业协助或立即联络中毒控制中心。

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A new study of reefs in the South Pacific suggests that some algae can poison coral on contact.

南太平洋最新珊瑚研究显示一些藻类在和珊瑚碰触时会释放出毒素，从而使珊瑚中毒。

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And if a child swallowed poison, 85 percent would know whom to contact.

而如果一个幼儿吞下有毒的物质时，85%的临时保姆知道应该与谁取得联系。

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Finally, any time your child ingests something that is not food, it can be helpful to contact the poison center that serves your area by calling 1-800-222-1222 (a nationwide number in the U.S. that routes your call based on your area code) for guidance.

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Symptoms can include difficulty breathing, vomiting and redness on the skin depending on how the affected person comes into contact with the poison.

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The people who initially came into contact with the letters showed no symptoms of exposure to the poison, but three officers who later examined the New York letter experienced minor symptoms that have since abated, police said.

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