The study of geometry and physics was especially difficult.

VOA: special.2009.11.15

It doesn't seem especially difficult to do that.

似乎这么做不是很难

耶鲁公开课 - 死亡课程节选

Like, it's really difficult especially at a school like Columbia,

不过，在像哥伦比亚这样的大学里做到这一点着实不易。

想学好英语吗？ - SpeakingMax英语口语达人

Bono has said that the hopeful message of this song is especially meaningful during these difficult times.

VOA: special.2009.04.10

Especially if you're asking difficult questions, use the "Would you" pattern.

特别是当你提出很困难的问题时，应使用“Would you”句型。

Would you 课堂 - SpeakingMax英语口语达人

And identifying the cause of the pain can be difficult, especially for untrained doctors.

VOA: special.2011.07.26

But making the vaccine more widely available especially in rural areas has been difficult.

VOA: special.2009.11.03

The F.A.O.says fish piracy is difficult especially for developing countries to fight.

VOA: special.2009.02.10

"Big ears, big old jug ears like that." Pett says,cartoonists are essential to showing the lighter side of life, especially in difficult times.

VOA: standard.2010.03.20

And,these are occurring at a time when the global economic crisis is making it more difficult to maintain good health, especially in the developing world.

VOA: standard.2009.05.18