[] a line of workers and machines in a factory that fit the parts of a product together in a fixed order装配线◆working on an assembly line在装配线上工作◆An engine rolls off the assembly line every 72 seconds.装配线每 72 秒完成一台发动机。◆Assembly line automation has reduced error rates in manufacturing.自动化装配线降低了生产误差率。⨁assembly line methods / problems / robots / workers装配线方法／问题／机器人／工人