bluebottle
n. 矢车菊; <英口>警察; 反吐丽蝇(腹部蓝色); <澳> 葡萄牙军舰
A bluebottle is a large fly with a shiny dark-blue body.
1. an annual Eurasian plant cultivated in North America having showy heads of blue or purple or pink or white flowers
2. blowfly with iridescent blue body; makes a loud buzzing noise in flight
It's very early in the year for a bluebottle.
现在出现反吐丽蝇还太早了些.
We could see a bluebottle on the rock.
我们能看见一只绿头苍蝇在岩石上。