冷空气来袭前储备好可能缺乏的药物，比如止痛药，减充血剂，治鼻窦炎和过敏的药。
Stock up on any medications you may be lacking, such as pain relievers, decongestants, and sinus and allergy medicines before the cold weather sets in.
在胃镜检查前，可能需要先在你的喉咙上喷麻醉剂进行局部麻醉。为了让你在造影过程中放松，医生还会在你的静脉给药。
You may have your throat sprayed with a local anesthetic before the test begins and given medication through a vein to help you relax during the examination.
生物还原剂是一种具有肿瘤乏氧靶向性的前药，它会在还原性环境中被还原产生具有细胞毒性的代谢物。
Bio-reductive drugs are pro-drugs that can selectively target the hypoxia cells in tumors. In reductive environment, they are reductively metabolized to generate toxic species.
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