By contrast Mr McCain's initial reactions were frenetic and contradictory.是什么意思？

By contrast Mr McCain's initial reactions were frenetic and contradictory.

相比之下,麦凯恩最初的反应是乱了阵脚,相互矛盾.

by

prep. 在…旁边，表示方式，由于，经过；adv. 经过，表示保留或保存时用，短暂拜访；

例句
...expensive make-up that we saw being advertised by a beautiful model...
我们所见的由一位漂亮模特代言的昂贵化妆品

contrast

n. 对比，对照，差异，对照物，对立面，[摄]反差；

例句
There is also an artful contrast of shapes...
形状的对比也很巧妙。

Mr

abbr. Mister 先生，Master 少爷，Mother 母亲，molecular radius 分子半径；

例句
According to police accounts, Mr and Mrs Hunt were found dead on the floor of their kitchen.
据警方称，亨特夫妇被发现死在家里厨房的地板上。

initial

adj. 最初的，开始的，首字母的；n. 首字母，[语音学]声母，特大的大写字母；vt. 用姓名的首字母签名；

例句
For an initial service, a 10 megahertz-wide band of frequencies will be needed.
初始服务需要10兆赫宽的频带。

reactions

n. 反应( reaction的名词复数 )，反动，反对，反作用力；

例句
Soya milk can cause allergic reactions in some children.
有些孩子会对豆浆过敏。

were

be的过去时复数和第二人称单数形式，有时代替 was,用于条件从句、动词 wish 之后等；

例句
Shops, houses, and vehicles were set ablaze.
店铺、房子和车辆全都陷于火海。

frenetic

adj. 发狂的，狂乱的，狂热的，非常激动的；n. 疯子，狂人；

例句
...the frenetic pace of life in New York...
纽约疯狂的生活节奏

and

conj. 和，与，而且，于是，然后，因此；

例句
I spend a lot on expensive jewelry and clothing...
我花很多钱购买昂贵的首饰和衣服。

contradictory

adj. 矛盾的，反驳的，抗辩的；n. 对立物，矛盾因素；

例句
Customs officials have made a series of contradictory statements about the equipment...
海关官员们对这种设备作出了一系列互相矛盾的陈述。