What does this sign mean?Where ca

What does this sign mean?Where ca What does this sign mean?Where what does this sign mean? What does this sign mean?可以写成 what is this sign mean?为什么? What does this sign mean?换一种表达 what does this sign mean? it tell us ____ here What does it mean What does this sign mean意思一样吗? What does that sign mean? what does the sign mean. what does this sign mean on the wall?为什么on the wall在前面,而mean what does this mean? （ ）What（ ）this sign（ A.do；means B.does;mean C.does;means D.d