ball feeder造句

• Several years ago the department lent the Banks a propane cannon that closely resembled a tennis ball feeder.
• According to Genser's account, Watts chopped up the ball feeder with an ax and threw the mangled machine over the wall of his gated complex.
• Continuing this " house that Watts built " argument, Genser then told a tale of how Watts was playing tennis one day, became frustrated with his serve and took his anger out on the automatic ball feeder.
• I assumed there must be a motor or something because the description of them always talks about an'Automatic'mode of operation versus'Manual'- which I took to mean that there must be some kind of automatic ball feeder . . . but there was certainly only one version of the Digi-Comp II so if your's has no motor then that's that.