大家在查： bactericide set out Creech conserve energy 发生改变 shrugs 瑟夫 traffic jams Gottlieb 甲苯

FallingBehind

FallingBehind

...超级大国后，每逢谈论美国衰颓时，总是有人要谈论美国落后 (fallingbehind)于某些国家。

　　laggard adj.缓慢的(slow orlate)；落后的(fallingbehind)；n. 落后者(one that lags or lingers)　　［记］lag(落后)+gard(构词成分)→...

man , . you 's " after ? : - Facebook what Yeah then your japan 4th as of own