a : a tool for hurling clay pigeons to the air b : sand trap c : a bit of leather or segment of interwoven leather-based straps among the thumb and index finger of the baseball glove that sorts an extension in the pocket （尤指为利用而）收集，存住，保存（热量、水等） A greenhouse stays warm https://josuelzjvf.blogsumer.com/29849165/the-basic-principles-of-rap