736~740 复习

wild-goose chase 徒劳无功、白费力气的追逐、搜寻、调查或追求

lay an egg 下蛋；完全失败，彻底失败，尴尬的失败

elephant in the room 避而不谈的、想回避的问题

bull in a china shop 笨手笨脚，鲁莽冒失的人

monkey on someone's back 毒瘾；持续的问题或负担

happy as a pig in mud

= very happy 

mud [U]泥，泥土，泥浆，淤泥

happy as a pig in muck

muck [U]（动物的）粪便

happy as a pig in clover

clover [U]三叶草，苜蓿（常作牛饲料的）

happy as a pig in a puddle

puddle [C]水坑（尤其指雨水坑）

I'm home from the work trip and happy as a pig in mud/muck/clover/a puddle. I can't wait to sleep in my own bed tonight!

我出差回到家，太高兴了。今晚我迫不及待想睡在自己的床上！

work trip 出差，工作出行

trip 行程，旅程，旅行

(live/be) in clover

生活安逸舒适