Many medicines are dangerous; the margin between dose and overdose is often narrow.
许多药物都具有危险性，适量和过量之间的分际通常差别很小。
An overdose of sun, sea, sand and chlorine can give lighter hair a green tinge.
过多的阳光、海水、沙和氯会给更浅色的头发带来点绿色。
You cannot overdose and it may help you fall asleep.
你不能过量，它可以帮助你入睡。
A narcotic overdose can cause central nervous system depression, respiratory failure, and death.
超剂量的麻醉镇痛药会造成中枢神经系统阻抑、呼吸停止以及死亡。
A narcotic overdose can cause central nervous system depression, respiratory failure, and death.
超剂量的麻醉镇痛药会造成中枢神经系统阻抑、呼吸停止以及死亡。
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