垂下: droopflagflap downholddownlillpendencyswagto hang down
用以: 1.use sth. to achieve an end 短语和例子我们要认真学习辩证唯物论, 用以指导实践。 we must study dialectical materialism so that we can use it to guide our work. 这就是林业工人用以运送木材的空中索道。 this is the cableway which the lu
