And incumbents often look invulnerable until they suddenly fall .
而且往往出版商在倒下的前一刻还看起来坚不可摧。
The corporation gets 3.6 billion ( $ 5.7 billion ) a year from a licence fee levied on every household that watches television , and is therefore invulnerable to the vagaries of the media market , while the technological change that has caused other media outlets to shrivel has given the bbc new scope for expansion .
As long as rioters are part of a street mob they feel strong and invulnerable .
这些暴徒只要加入街头暴徒的行列，就会觉得自己无懈可击。
Because they are quiet and constantly moving , they are essentially invulnerable to pre-emptive attack ; there is less pressure to use them or lose them .
因为它们在悄无声息中不断移动，在先制攻击中几乎无懈可击；使用或失去都没有那么大的压力。
These clothes , she says , are meant to convey that he 's a seemingly invulnerable superhero type in the beginning .
