tree martins造句

例句与造句

1. This species is highly gregarious and forms large flocks, often with tree martins.
2. The most similar species, the tree martin, has a shallowly forked tail and blue-black head and nape.
3. Tree martins have a fast twisting flight and feed higher than welcome swallows, often more than 6 m above the ground.
4. It's difficult to find tree martins in a sentence. 用tree martins造句挺难的