B-vitamins
B族维生素
🧩 词语组成解析
n. 维生素（ vitamin的复数形式 ）
🗣️ 情景例句
They get better and better.
它们越来越好。
Please take a brief look at the list of words.
请把单词表过目一下。
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。