请问knock at door 的at是"(表示某人重复做某事)"的意思吗?就像这句例句?Miss Melville took a cookie and nibbled at it.\x05梅尔维尔小姐拿起一块饼干小口吃起来.

请问knock at door 的at是"(表示某人重复做某事)"的意思吗?就像这句例句?Miss Melville took a cookie and nibbled at it.\x05梅尔维尔小姐拿起一块饼干小口吃起来.
请问knock at door 的at是"(表示某人重复做某事)"的意思吗?
就像这句例句?
Miss Melville took a cookie and nibbled at it.\x05
梅尔维尔小姐拿起一块饼干小口吃起来.

请问knock at door 的at是"(表示某人重复做某事)"的意思吗?就像这句例句?Miss Melville took a cookie and nibbled at it.\x05梅尔维尔小姐拿起一块饼干小口吃起来.
这个例句与你提的问题有联系吗

不是，是固定搭配。敲门就是knock at the door,nibble at一小口一小口的吃。