Ecs
abbr. 环境控制系统（Environmental Control System）；发动机控制系统（Engine Control System）；能源通信服务（Energy Communication Service）
🗣️ 情景例句
Good-bye. And hope to see you soon.
再见。希望很快再见到你们。
How much is the telephone bill a month?
每个月电话费要多少钱？
Some of the bigger firms are engaged in researches which are of such general and fundamental nature that it is a positive advantage to them not to keep them secret.
某些大公司进行的研究属于一般和基础性的研究。因此不保密对他们才有利。