The Bundesbank's seemingly impregnable position has begun to weaken.是什么意思？

The Bundesbank's seemingly impregnable position has begun to weaken.

德意志联邦银行看似不可撼动的地位开始削弱了。

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。

seemingly

adv. 看来似乎，表面上看来，貌

例句
She was rich, beautiful and seemingly ageless.
她富有而美丽，永远显得那么年轻。

impregnable

adj. 攻不破的，坚不可摧的，无可辩驳，毫不动摇；

例句
In those impregnable mountains, the guerrillas could hold out for years.
在那些易守难攻的大山里，游击队可以坚持很多年。

position

n. 位置，方位，地位，职位，态度，状态；vt. 安置，把…放在适当位置，给…定位，驻扎军队；

例句
As long as most people are happy to have the monarchy, the abolitionist position is an arrogant fantasy.
只要大多数人还乐意保留君主制，废除它的主张就是痴人说梦。

has

v. 有( have的第三人称单数 )，（亲属关系中）接受，拿，买到；

例句
...the operation a patient has had.
病人做过的手术

begun

n. [人名] 贝根，[地名] [印度] 贝贡；v. 开始（begin的过去分词）；

例句
The women who worked in these mills had begun to agitate for better conditions.
在这些工厂里做工的妇女们开始抗议要求改善工作条件。

to

prep. 向，朝着，到，关于，属于；adv. 朝一个方向的，到某种状态，关闭；

例句
I suggest you leave it to an expert...
我建议你把它留给专家来解决。

weaken

vt.& vi. （使）削弱，（使）变弱，衰减，变得优柔寡断；

例句
There was one caveat: he was not to enter into a merger or otherwise weaken the Roche family's control of the firm.
有一点需要预先声明：他不得参与合并，或以其他方式削弱罗奇家族对该公司的控制。