胸痛观察单位。

Chest pain observation units.

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当患者是在观察单位时，也有给患者提供保健服务的一个机会即能提供药物停止建议。

While patients are in an observation unit, there's also an opportunity for healthcare providers to offer drug-cessation counseling.

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声明推荐既然多数可卡因伴生的胸口痛不是心脏病发作，伴有胸口痛的可卡因药物使用者应在在观察单位内被监测九个到12个小时。

Since most cocaine-associated chest pain is not a heart attack, cocaine users with chest pain should be monitored in an observation unit for nine to 12 hours, the statement recommends.

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First there was the observation by Michelson who back in the late 1880s had done very precise interferal metric measurements of the hydrogen lines and had observed that the 656 nanometer line 3 associated with the transition of n equals 3 to n equals 2 was, in fact, a doublet.

首先是麦克逊,在1880年底的观察,他以公制单位对氢原子的光谱线,作了准确的，无其他因素干扰的，测量,发现当n值由3变为2时,会同时得到波长为656纳米的谱线3,实际上是有两条线。

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