sign-posts是神马意思?原句是：By smelling grass,trees and sign-posts,dogs can know where they are.
问题描述：
sign-posts是神马意思?原句是：By smelling grass,trees and sign-posts,dogs can know where they are.
答
sign-posts指示牌;标志杆
通过闻草,树木和指示牌,狗可以知道他们在哪里.