However, because tcpserver doesn't attempt to understand the communication, it is very difficult to attack.

然而，因为tcpserver并不试图理解通讯，所以很难被攻击。

youdao

The Pinyin is studies the Chinese character the foundation, is also the fortress which in the language teaching difficult to attack.

汉语拼音是学习汉字的基础，也是语文教学中一个难攻的堡垒。

youdao

Co: Within the patent offices there are always budget limitations and staffing constraints that make it difficult to attack all goals at once.

CO：在专利机构中总是存在预算紧张和人员安排的问题，一下子实现所有的目标非常困难。

youdao

Still, her profile makes her difficult to attack, and Rick Lazio's Senate candidacy has to help the GOP nominee.

CNN: Stuart Rothenberg: Spotlight congressional races of the week

It's very difficult to attack a team that defends with nine players.

CNN: STORY HIGHLIGHTS

The incoherence of this stance makes it conveniently difficult to attack.

ECONOMIST: Gay marriage