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- Any of numerous small, flat-bodied, wingless biting or sucking insects of the orders Mallophaga or Anoplura, many of which are external parasites on various animals, including human beings. 虱，寄生虫无数小的，身体扁平，没翼的咬人吸血昆虫，其中许多是多种动物的外部寄生物
- Any of numerous small,flat-bodied,wingless biting or sucking insects of the orders Mallophaga or Anoplura,many of which are external parasites on various animals,including human beings. 虱，寄生虫无数小的，身体扁平，没翼的咬人吸血昆虫，其中许多是多种动物的外部寄生物。
- He is just listening in external of that room. 他正在那房间的外面留神听着。
- This news program only covers external events. 这一新闻节目只报道国外消息。
- She sets great store by external politeness. 她很注重表面的虚礼。
- external parasitism 外(部)寄生(现象)
- wingless fly that is an external parasite on sheep and cattle. 寄生在羊和牛体外的无翅苍蝇。
- wingless fly that is an external parasite on sheep and cattle 寄生在羊和牛体外的无翅苍蝇
- The scientific study of parasitism. 寄生物学，寄生虫学对寄生（现象）的科学研究
- Our external trade has expanded during recent years. 我国的对外贸易近几年来有所发展。
- He judge people by mere external clothes rather than internal character. 他判断人只靠着外表的衣服而不是内在的品格。
- The metal or plastic external structure of a motor vehicle. 车身机动车的金属和塑料的外部结构
- External torques arise from outside the system. 外转矩是由系统外部生产的。
- Fluid motion caused by an external force such as gravity. 流体运动由重力等外力引起的流体运动
- Add the suppression of parasitism, and it will be solved. 加上又消灭了各类寄生虫，问题将会得到解决。
- The damage was caused by external forces. 损害是由外力引起的。
- Four types of external balances are in general use. 通常使用的外式天平有四种。
- Nature is the great agent of the external universe. 大自然是客观宇宙的主要力量。
- They are the external or uncontrollable factors. 它们是外在，无法控制的因素。
- Insects need an external source of sterols. 昆虫需要外界来源的固醇类。
