1、challenge
挑战;难题
I like a big challenge and they don't come much bigger than this.
我喜欢大的挑战，而所有挑战中再没有比这更大的了Th*vv3cb*_hnu。
The new government's first challenge is the economy.
新政府面临的第一个难题是经济问题qwerIZYX[080ZoW^。
(成功地)应对挑战，迎接挑战
The new Germany must rise to the challenge of its enhanced responsibilities.
一个崭新的德国必须迎接挑战，承担更多的责任w4z@yB-Kp*!Niw+O。
They rose to the challenge of entertaining 80 schoolchildren for an afternoon.
他们一个下午成功接待了80名学童ldr.]h0,q)n4U(AY。
怀疑，质疑(真实性、价值、权威等)
Democratic leaders have challenged the president to sign the bill.
民主党领袖对总统签署这项法案提出了质疑idZdX52ESj]M*。
The move was immediately challenged by two of the republics.
此项动议立即遭到其中两个共和国的反对*1#*_2|[s^evG3&。
挑战；向…下战书
A mum slashed a neighbour's car tyre and challenged her to a fight after their daughters fell out.
两家的女儿吵起来后，一个妈妈划破了邻居的车胎，说要和她较量较量q5y6ibajQ#CI。
He left a note at the scene of the crime, challenging detectives to catch him.
他在犯罪现场留了个条儿，向警探挑衅p1iq%6j^3ae(oK。
2、turn against
(使)与…反目;(使)反对;(使)反感
A kid I used to be friends with turned against me after being told that I'd been insulting him.
曾和我很要好的一个小孩听人说我一直在辱骂他以后就和我翻脸了rwPRA5XTg(_&Ru。
Workers may turn against reform
工人们可能反对改革3Uvl2grl3uvgiT。

N1cjSNnvmDjfq]KV-l7~Xr*+OcBcCt61ESohP4%JR|2%zv)z)IX7%Ckt 来源:可可英语 http://www.kekenet.com/Article/201512/414563.shtml