1. To execute(someone) by suffocation so as to leave the body intact and suitable for dissection. 
   把某人勒死以出卖尸体勒死（某人）并使其尸体保持完整以适合于解剖之用
2. A feeling of constriction in the throat caused by emotion. 
   哽咽感情激动造成的喉咙哽住
3. Constriction of a blood vessel, as by a nerve or drug. 
   血管缩小血管的缩小，如由于紧张或药物
4. reproduction of some unicellular organisms by growth and specialization followed by the separation by constriction of a part of the parent. 
   一种无性繁殖形式，其中外部生长物在母体中发育，然后脱离产生一个新的个体。
5. A chronic respiratory disease, often arising from allergies, that is characterized by sudden recurring attacks of labored breathing, chest constriction, and coughing. 
   气喘（病）一种长期的呼吸系统疾病，通常由过敏症引起，特征是呼吸剧烈，胸部收缩，及咳嗽等的突然复发

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