昆虫纲昆虫躯体左右对称·头部为感觉摄食中心·口器为咀嚼式、刺吸式、舔吸式·足三对，常有翅1-2对，可无电业站sai
昆虫纲 •昆虫躯体左右对称 •头部为感觉摄食中心 •口器为咀嚼式、刺吸式、舔吸式 •足三对，常有翅1-2对，可无
昆虫纲完全变态Complete metamorphosisThe cycle of developmentinvolves egg, larva, pupa() and adult. Each stageis morphologically distinctfrom the other
昆虫纲 •完全变态（ Complete metamorphosis ） The cycle of development involves egg, larva, pupa (蛹) and adult. Each stage is morphologically distinct from the other.
石河子大学医学院病原生物学与免疫学昆虫纲二、生活史·完全变态（Complete metamorphosis·不完全变态（ Incomplete metamorphosisThe morphological differencebetween adults and immaturestages are mainly of size andsexual maturity. Thereforeeach stages morphologicallyresembles the other若
昆虫纲 二、生活史 •完全变态（ Complete metamorphosis ） The morphological difference between adults and immature stages are mainly of size and sexual maturity. Therefore, each stages morphologically resembles the other. •不完全变态（ Incomplete metamorphosis ） 石河子大学医学院病原生物学与免疫学
Nymph(若虫): An immature stages in insectswhich undergo incomplete metamorphosisEcdysis(蜕皮): Shedding ofthe larval skinduring transformation from one stage toanother.(羽化): The appearance of theEmergence(winged insect from the putal stageMaggott (): The common name given to the(双翅目)larva of someDiptera
Nymph(若虫): An immature stages in insects which undergo incomplete metamorphosis. Ecdysis(蜕皮): Shedding of the larval skin during transformation from one stage to another. Emergence(羽化): The appearance of the winged insect from the putal stage. Maggot (蛆): The common name given to the larva of some Diptera (双翅目)
蚊（Mosquitoes李时珍《本草纲目》：蚊处处有之，冬垫夏出，昼伏夜出，细身利喙，咂人肤血大为人害．.产于水中，为子子虫，乃变为蚊也
蚊（Mosquitoes） •李时珍《本草纲目》：蚊处处有之，冬蛰 夏出，昼伏夜出，细身利喙，咂人肤血， 大为人害.产于水中，为孑孓虫，乃变为 蚊也