be an excitant
常用系表结构表示某物是兴奋剂。
Caffeine is an excitant.
咖啡因是一种兴奋剂。
使人兴奋或刺激的东西；兴奋剂。
使人兴奋或刺激的东西；兴奋剂。
Something that excites or stimulates; a stimulant.
Caffeine is a common excitant found in coffee and tea.
咖啡因是咖啡和茶中常见的一种兴奋剂。
用法提示：名词用法，指具有刺激作用的物质
The drug was originally developed as an excitant for medical use.
这种药物最初是作为医疗用的兴奋剂开发的。
用法提示：名词用法，指用于医疗的兴奋剂
Athletes are prohibited from using any excitant before competitions.
运动员在比赛前禁止使用任何兴奋剂。
用法提示：名词用法，指违禁的兴奋剂
常用系表结构表示某物是兴奋剂。
Caffeine is an excitant.
咖啡因是一种兴奋剂。
表示某物发挥兴奋剂的功能。
Certain drugs act as excitants.
某些药物起兴奋剂作用。
注意介词as搭配，表示用途。
Some athletes use caffeine as an excitant.
一些运动员把咖啡因用作兴奋剂。
指定某来源中的兴奋剂。
The excitant in coffee is caffeine.
咖啡中的兴奋剂是咖啡因。
grammar · medium
易错句子The movie was very excitant.
正确表达The movie was very exciting.
excitant是名词，表示“刺激物”，不能用作形容词；表示“令人兴奋的”应使用exciting。
grammar · medium
易错句子I feel excitant about the trip.
正确表达I feel excited about the trip.
excitant是名词，不能表示人的兴奋状态；表示“感到兴奋的”应使用excited。
二者均为名词，指能引起兴奋或刺激的物质。但excitant侧重于引起生理或神经的兴奋反应，常用于医学或生物学；stimulant则更广泛，包括咖啡因等日常兴奋剂，也常用于指非法兴奋剂。
二者均可指刺激物，但excitant主要带来兴奋或激动，而irritant通常引起不适、疼痛或烦躁，如化学刺激物或令人恼怒的事物。
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