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
Where will we put all the presents?
我们把这些礼物放在哪里？
To build with blocks
搭积木
One day she came into my room laughing happily.
有一天，她开心地笑着来到我的房间。