sand martin
US /sænd ˈmɑːr.tɪn/
UK /sænd ˈmɑːr.tɪn/

名词
1.
沙燕
a small, brown migratory bird of the swallow family, typically nesting in tunnels dug into sandy banks.
示例:
•
We watched the sand martins darting over the river.
我们看着沙燕在河上飞来飞去。
•
The cliff face was dotted with the nests of sand martins.
悬崖峭壁上点缀着沙燕的巢穴。
在 Lingoland 学习这个单词