System calls are the easiest and the hardest part of emulation.

系统调用是模拟中最简单也是最困难的部分。

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All you've got to do is decide to go and the hardest part is over. So go!

旅行最困难的部分莫过于下定决心出发。既然已经决定，就义无反顾吧！

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And the company is still driven by the philosophy in Across Asia on the Cheap: 'All you've got to do is decide to go and the hardest part is over. So go!'

这家出版社仍然沿续了《廉价走亚洲》一书中的理念：“最艰难的部分已经完成了，你所要做的就是决定出发，出发吧！”

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And I think that's the hardest part is

我认为最难的部分是，

英语为什么这么难呢？ - SpeakingMax英语口语达人

"For me, the searching and not knowing was the hardest part, " says Ms. Lapidus.

WSJ: Making Gene Mapping Part of Everyday Care

Mr. Froman says common regulations and standard setting will be the hardest and most important part to find agreement on.

WSJ: Bartering Over a Trans-Atlantic Trade Deal

"I really feel people don't understand what was said or who I am, and that's the hardest part, " he said.

BBC: SPORT | Golf | Casey hampered by course heckler