水果西瓜太郎
尼古丁(nicotine)、A colorless, poisonous alkaloid, C10H 14N 2, derived from the tobacco plant and used as an insecticide. It is the substance in tobacco to which smokers can become addicted. 尼古?。簾o色有毒生物堿，C10H 14N 2，從煙草中提取被用作殺蟲劑，它是煙草中致使吸煙者上癮的物質(zhì)
優(yōu)質(zhì)英語培訓(xùn)問答知識(shí)庫
