duct system的用法和样例：
例句
- A duct system carries Bile from the liver to the duodenum and the gallbladder.
肝内有一个胆道系统把胆汁从肝带到十二指肠和胆囊。 - For multi-plate molds, however, positive ejection of the runner system is not practicable.
可是对于多模板的模具，流道系统的可靠顶出是不可能的。 - There are various failure modes, which could affect a piping system.
目前已知的影响管道系统的有不同的失效方式。 - They produce sperm which may be ejaculated through a system of genital ducts.
产生能通过生殖管道系统射出的精子。
