affecting or connected with the whole of something, especially the human body 涉及全系统的；系统的；影响全身的；全身的 a systemic disease 一种全身性疾病
systemic chemicals or drugs that are used to treat diseases in plants or animals enter the body of the plant or animal and spread to all parts of it （农药等）内吸的 systemic weedkillers 内吸除草剂
Word Originearly 19th cent.: formed irregularly from system + -ic.