Predeflection
偏转之前
🗣️ 情景例句
Something old ...
旧的东西……
Almost everyone is aware of environmental problems in America.
在美国，几乎人人都注意到环境问题。
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。