Ecos
abbr. 嵌入式可配置操作系统（Embedded Configurable Operating System）；扩展式通信操作系统（Extended Communication Operating System）
🗣️ 情景例句
That's for a long distance call you make two nights ago.
这是你两天前打的一个长途电话的费用。
His courage is a lesson to us.
他很有勇气，是我们大家的榜样。
Being a mother is not easy.
做一个母亲是不容易的。