ec全称 etcetera,中文含义有等等;以及其他(类似的)诸如此类。一般放在句末表示列举未完。例句有1. He can't see, hear, etc very well他的视力、听力等不太好。2. A recent event, development, occurrence,etc不久前的事件、发展、事情等3, Equipment management, including conductf equipment calibration or verification, etc.设备管理,包括校验及检测等。