Blueback
非英国海军部出版的海图(背面为蓝色的)
🗣️ 情景例句
And good luck! I've got to go.
祝你好运 我得走了。
This product is doing very well in foreign countries.
这种产品在国外很畅销。
The bridge is so long that the shape of the earth had to be taken into account by its designer.
由于桥身太长，设计者不得不考虑了地表的形状。