Definition: a written or printed mark which has a standard meaning Level: B2
+ 和 - 是数学符号。
+ and - are mathematical ___signs.
£ 是英镑的符号。
£ is the ___sign for the British pound.
在地图上，十字形通常是医院的标志。
On a map, a cross is often the ___sign for a hospital.
