Blueback
非英国海军部出版的海图(背面为蓝色的)
🗣️ 情景例句
Thanks. I'll see you Monday at the office.
谢谢。咱们星期一办公室再见了。
Why are you so busy?
你为什么这样忙碌？
Is the population of the world still growing?
世界人口仍然在增长吗？