您要查找的是不是：
- 倒U曲線inverse U curve
- 「倒U曲線」假說"upside- down U curve" hypothesis
- 庫茲涅茨倒U曲線Kuznets' reversed U curve
- 曲線(n) curved shape
- 倒U假說Inverted-U-Type Hypothesis
- u盤
- 倒U型特徵converse U type characteristic
- 曲線的curvilinear
- 倒出swill
- 標準曲線specification curve
- 倒U型假說Inverted-U Hypothesis
- 曲線擬合curve fitting
- 倒掉outwell
- 倒檔reverse gear
- 擬合曲線fitting curve
- 倒鉤barb
- 特性曲線frequency plot
- 翻倒overturn
- 變化曲線change curve
- 倒過來the other way around
