passing fancy

• 心血来潮

passing fancy的用法和样例：

例句

1. She said she wanted a dog but it was only a passing fancy.
   她说想要一条狗，但这不过是一时心血来潮。
2. Her latest flight of fancy is to go camping in the Sahara desert!
   她最近心血来潮想到撒哈拉沙漠去野营！