Aou
abbr. 美国鸟类学家协会（American Ornithologists' Union）；表观氧利用（Apparent Oxygen Utilization）
🗣️ 情景例句
for coming all this way from the city to talk to me about it.
从城里大老远赶来和我谈这件事。
To examine the problem
检讨问题
Not to grasp firmly is not to grasp at all.
抓而不紧等于不抓。