漢譯英：他爸爸是桂林壹家工廠的工程師。 濤濤沒有兄弟和姐妹 他是壹名數學教師 妳的好朋友多大了？

His father is a engineer of a factory of Gui lin in China ,Taotao don't have brothers and sisters,he is a mathematics teacher .How old are your friend?