semaphore
柯林斯詞典
1. N-UNCOUNT Semaphore 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. 旗語(yǔ)
返回 semaphore
1. N-UNCOUNT Semaphore 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. 旗語(yǔ)