Investors and currency dealers were caught completely unawares by the Bundesbank's action.是什么意思？

Investors and currency dealers were caught completely unawares by the Bundesbank's action.

投资者和外汇交易商被德意志联邦银行的这一举措打了个措手不及。

investors

n. 投资者，出资者( investor的名词复数 )；

例句
It's illegal to get into a formal agreement with investors that they'll buy in the aftermarket.
与投资者达成正式协议、允许他们在后市上买入的做法是非法的。

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。

currency

n. 货币，通用，流通，流传，传播，市价，行情，流通时间；

例句
If you travel frequently, find an agency that will change one foreign currency directly into another.
如果经常旅行，找一家能直接兑换外币的旅行社。

Dealers

n. 商人( dealer的名词复数 )，贩毒者，毒品贩子，发牌者；

例句
Saab dealers are currently giving away unaccompanied 24-hour test drives in posh demonstrator models.
萨博汽车的经销商目前正推出高档样品车无人陪同的 24 小时试驾活动。

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。

caught

v. 赶上( catch的过去式和过去分词 )，接住，引起，看见；

例句
The men were caught in the act of digging up buried explosives.
那些人在挖掘掩埋的爆炸物时被逮个正着。

completely

adv. 完全地，完整地，完全，彻底，全部，一干二净，很，非常，充分，十分，万分；

例句
...a second career which absorbed her more completely than her acting ever had.
比演艺生涯更让她投入的又一职业

unawares

--

例句
Investors and currency dealers were caught completely unawares by the Bundesbank's action.
投资者和外汇交易商被德意志联邦银行的这一举措打了个措手不及。

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

the

art. 指已提到的人（物），指说话人与听者已知的人（物），用于独一无二的事物前，与形容词最高级和序数词连用；

例句
He did have a real knowledge of the country...
他对该国的确知之甚多。

action

n. 行动，活动，功能，作用，手段，[法]诉

例句
The government is taking emergency action to deal with a housing crisis...
政府正采取紧急措施解决住房危机。