Warning: file_put_contents(/www/wwwroot/ppbbbu/oiqp.com/cache/30b8044f34b150cbdba1cc7bbf26e4b0.txt): failed to open stream: No space left on device in /www/wwwroot/ppbbbu/oiqp.com/index.php on line 55 semaphore英英字典_semaphore剑桥英语解释_semaphore柯林斯英文解释_奇葩剧汉英词典
1. N-UNCOUNTSemaphore is a system of sending messages by using two flags. You hold a flag in each hand and move your arms to various positions representing different letters of the alphabet. 旗语