In addition, in the early stages of the salmon's life cycle, a good supply of fly life indigenous to the northern European rivers is necessary for the juvenile salmon, or parr, to survive.

而且，在鲑鱼生命的早期阶段，大量的北欧河流中的飞虫对小鲑鱼的生存是必要的。

youdao

Rachel seems to be the one fly in the ointment of Caroline's smooth life.

雷切尔似乎是卡罗琳平静生活中惟一的破坏因素。

《柯林斯英汉双解大词典》

They fly for their whole life and try to sing the most beautiful songs.

它们一生都在飞翔，试图唱出最优美的歌声。

youdao

Go to the airport, get on that plane, and fly out of my life forever.

NPR: Profile: Luciano Pavarotti

Here's a woman so clearly in love with the natural world, dedicating her life to killing a fly just because it's a nuisance.

NPR: Waging a One-Woman War Against Black Flies

The life-saving ambulances fly hundreds of times a year at up to 150mph and can reach any part of Kent, Surrey or Sussex in under 20 minutes.

BBC: Air ambulances to fly at night in Sussex, Kent and Surrey