If you must use a PTFE-lined pan, keep your stove's burner on medium or lower. Also, never preheat an empty pan.

非要使用PTFE(聚四氟乙烯)内衬的平底锅时，应保证炉头处于中等或更低温度。另外，绝对不要预热空无一物的平底锅。

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If you must use a PTFE-lined pan, keep your stove's burner on media or lower. Also, never preheat an blank pan.

非要使用PTFE(聚四氟乙烯)内衬的平底锅时，应保证炉头处于中等或更低温度。另外，绝对不要预热空无一物的平底锅。

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If you have a gas grill, preheat by using the burner on only one side, on medium heat, for about 15 minutes.

NPR: Grill-Off: Bittman Takes on America's Chefs