Operational efficiency
[经] 经营效率
🧩 词语组成解析
🗣️ 情景例句
Well, I see you're feeling better.
嗯， 我看得出你感觉好些了。
Help yourself.
请便！
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。