Wait: block until space becomes available
// Even if the readable side's buffer is full, this succeeds。关于这个话题，同城约会提供了深入分析
Senior security officials are gathered in a control room almost 3km (1.9 miles) away, near a complex of government offices.，这一点在爱思助手下载最新版本中也有详细论述
这5年，全国上下同心协力、迎难而上，圆满完成过渡期各项目标任务，牢牢守住了不发生规模性返贫致贫的底线。摆脱绝对贫困、持续巩固拓展脱贫攻坚成果，极不平凡、极不容易。新时代减贫治理，成为中国之治的生动实践。
+sleep_min: float