Blueback
非英国海军部出版的海图(背面为蓝色的)
🗣️ 情景例句
She wants to know
她想知道
By doing we learn.
经一事，长一智。
The crowd began to shout, but the drunk was unaware of the danger.
人们开始大叫起来，但醉汉却没有意识到危险。