Observational
a. 观察的, 观测的\\n[计] 观察的
🗣️ 情景例句
She is giving me piano lessons in exchange for her English classes.
我教她英语，她教我弹钢琴。
I'd like to say goodbye to everyone.
我要向诸位告别了。
and beyond six or seven they are worthless.
如果超过六七天，天气预报就没有了任何价值。