frustratingly造句怎么写

The rights the charter and its many offshoots promised proved frustratingly unenforceable.

Promises of help to modernise the Polish armed forces (" we provide the boys, you provide the boots "as a Polish official once put it) have proved frustratingly empty.

In the period from A. D. 300 to 700, both archeological excavations and frustratingly ambiguous accounts in later Chronicles let us glimpse dimly the emergence of a politically unified Japan.

While all ofthese terms are frustratingly vague, we can't help but feel that they aredescribing our little brother.

It is frustratingly hard to say how much value for money these professionals provide.

The point of all this, really, is that no one search engine is perfect and that, frustratingly, we travelers still have to do a whole lot of work to ensure we're getting the best deal.