Alcoa
abbr. 美国铝公司（Aluminum Company of America）
🗣️ 情景例句
Thank you, sir.
谢谢您，先生。
From the father comes honour; from the mother, comfort.
荣誉由父次，安慰由母与。
they can locate and steer clear of obstacles -- or locate flying insects on which they feed.
并能通过回声来确定并躲开障碍物，或找到它们赖以为生的昆虫。