去痰剂 expectorant
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利用如止咳去痰制剂等药物帮助孩子睡眠可能会埋下隐患。
Using drugs such as Benadryl to help a child sleep may mask underlying problems.
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当吸痰器伸入一些病人的气管里去清除淤痰时，我看见他们痛苦地张大嘴去呼吸空气。
I have seen people gasp for air as a suctioning device cleaned their tracheas.
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