Baking sheet = 大而扁平的矩形，墙壁不是很高。 这对于烘烤平坦或不太高的东西很有用。 Baking pan = 这个锅的壁更高，可能有 10 或 15 厘米高。 这是一个很好的锅来烹饪有很多液体的东西。 Good luck.

Great question! They can often be used for the same purposes but there are some differences. Baking pans are deeper than baking sheets which are completely flat. Baking pans often allow for the baking of runny batters while baking sheets do not. The cooking times might vary depending on whether you are using a sheet or a pan. Also, they both can be made from many different materials but sheets are almost always made of metal. And lastly, baking sheets might not be good for cooking acidic foods (like lemon) because it can leave a metallic aftertaste in your food (from the aluminum). Hope this answer helps! What are you planning on baking?