自己顶下了，希望在沉掉之前，得到答案。

顶下，希望高手来解决···

The CHNS Household Daily Food Master File (NUTR1) contains information regarding the household foods that were obtained, consumed and discarded during the CHNS Diet Survey. As a longitudinal file, this file contains multiple years of data for each household. A household can have from 1 to 7 years of data as designated by the WAVE variable which contains the survey year, 1989, 1991, 1993, 1997, 2000, 2004 or 2006. And each year will normally have multiple foods as designated by the FOODCODE variable.

“And each year will normally have multiple foods as designated by the FOODCODE variable.”
这foodcode变量的观察值只是一些类似110,112,144,222,404 的数字，具体含义并不知道！

在“中国食物成分表”中应该可以找到