笔记要点目录
①吃过亏才长记性
②折叠的，可展开的
③剖宫产，剖腹产
④快速离开
这篇笔记对应“那些以为必死无疑结果没受什么伤的经历 (1)”这篇推送，一个很有意思的英文问答帖子。
learn something the hard way 表示understand a situation or develop a skill by learning from your mistakes and bad experiences，通过犯错或者惨痛经历之后才明白某个道理，或者才学会某个技能，接近中文说的，吃个教训、吃过亏才长记性。
Everyone will tell you that becoming a mother is challenging, but you never really know what that means until you learn it the hard way.
I learned the hard way not to trust door-to-door salesmen.
fold out couch 是折叠式沙发，fold-out做形容词表示“折叠的，可展开的”，比如说杂志里有一页是可以展开的，展开是一张大海报，a fold-out poster in the magazine.
c section 是Caesarean /səˈzeəriən/ section的简写，表示剖宫产，剖腹产。
The baby was born/delivered by Cesarean section.
hightail it 表示to leave or go somewhere in a great hurry，快速离开某个地方，主要是美式英语里使用，是informal非正式用语。这个短语的起源和有些动物翘着尾巴逃跑的样子有关。
As soon as I heard he was coming I hightailed it out of there.
When Jane remembered it was his birthday, she hightailed it to the bakery for a cake.