🧩 词语组成解析
a. 二回羽状的
leaf
[lif]
n. 叶子;页;叶状的结构;金属薄片;
vt.& vi. 翻书（报）;
vi. 生叶;
🗣️ 情景例句
Glad to see you too, we met two years ago.
我也很高兴，我们两年前见过一次。
Failure is the mother of success.
失败是成功之母。
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。