etc is used at the end of a list to indicate that you have mentioned only some of the items involved and have not given a full list. etc is a written abbreviation for 'et cetera'.
双语例句
例：
She knew all about my schoolwork, my hospital work, etc.
她知道所有有关我学业、医院工作等的情况。
例：
Each of the twelve major body systems – stomach, lungs, pancreas, etc – is closely related to certain muscles.