Combine the stock, whole onion and peppercorns in a pan and bring to a simmer.将高汤、一整头洋葱和胡椒粒一起放入锅里用文火慢煮。She crushed the peppercorns into a fine powder.她把胡椒粒捣成很细的粉末。Store the peppercorns in an airtight container and grind the pepper as you need it.将胡椒粒储存在密封容器中，在需要的时候磨成粉。