Osy
abbr. optimum sustainable yield 最适宜可持续产量
🗣️ 情景例句
You can't take her promises seriously, she never keeps her word.
她答应的事不用当真，她说话从来不算数。
The student is busy studying math.
这个学生忙于研究数学。
What's the weather going to be like at the weekend?
周末的天气怎样？