1.be bitten by sth
被……咬
I was bitten by a dog once and I've been afraid of them ever since.
我曾被狗咬过，自那以后就一直害怕狗。
Every year in this country more than 50,000 children are bitten by dogs
每年这个国家有5万多儿童被狗咬伤。
Three apples on the table are bitten by mice.
桌上的三只苹果全被老鼠啃过了。
The boy was bitten by a mad dog.
那个男孩被一条疯狗咬了。
He was bitten by a snake.
他被蛇咬伤了。
He had been bitten by a rattlesnake.
他被响尾蛇咬过。
We were all badly bitten by mosquitoes.
我们都被蚊子咬惨了。
2. be bitten by the ... bug
迷上……；对........感兴趣；热衷于.......；
to become very enthusiastic about something。
字面意思就是被某某虫子咬了。这个表达，把你对某个事物的兴趣或者热情比作虫子，当你被这个虫子咬了，就心痒难耐，无法抑制。因此，be bitten by the ...bug, 就是对某物着迷感兴趣。
He's been bitten by the travel bug.
他迷上了旅游。
Bitten by the travel bug, he set off for a working holiday in Australia.
他对旅行有强烈的兴趣，他开始在澳大利亚工作度假。
I'd been bitten by the back-packing bug pretty hard.
我对背包徒步旅行深深着了迷。
I've definitely been bitten by the gardening bug
我被园艺彻底迷住了。
I've definitely been bitten by the gardening bug, and now I love weeding and digging.
我对园艺有强烈的兴趣，现在我喜欢除草和挖土。
After trying a yoga class, I was bitten by the yoga bug.
上了瑜伽体验课之后，我迷上了瑜伽。
Joe was bitten by the acting bug as a five-year-old.
乔5岁时迷上了表演。
My friend Alex called me up and said that he was bitten by the fishing bug.
我的朋友亚历克斯打电话给我，说他迷上了钓鱼。
Molly's really enjoying rehearsing for the school play—it seems she's been bitten by the acting bug.
莫莉真的很喜欢为学校的戏剧排练--看来她对演戏有强烈的兴趣。
She was never interested in fitness before but now she's been bitten by the bug.
她以前从来不在乎健身，现在她却着了迷。
She provides a guide to Britain's antiques markets and a very useful reference list for those seriously bitten by the bug.
她提供了一份英国古董市场的指南，并为那些有强烈兴趣的人提供了一份非常有用的参考清单。