block: Writes wait until buffer space is available. Use when you trust the producer to await writes properly.
While not a cover of The Yardbirds' 1965 single of the same name, it aims for similar territory.
，更多细节参见同城约会
英國超市將巧克力鎖進防盜盒阻止「訂單式」偷竊
再直白点，就是你买回去要么自己跟维京重新谈，要么自己重做一套系统——成本？时间？自己掂量。