正宗的用英语怎么说

The correct term for "正宗" in English is "authentic". It comes from the Latin word "authenticus", which means "original" or "genuine".
Here are some examples of how to use "authentic" in a sentence:
The restaurant serves authentic Italian food.
She has an authentic smile that always lights up a room.
This painting is believed to be an authentic Rembrandt.
In Chinese:
这家餐厅提供正宗的意大利食物。
她有一个真诚的笑容总能点亮整个房间。
这幅画被认为是正宗的荷兰画家伦勃朗的作品。