We're just having some cola before getting to the tough stuff — math.
我们只是在对付难缠的数学之前先喝些可乐。
The fact of the matter is building quality software has and will always be tough stuff.
事实上，编写出优质的软件已经成为，且永远都是一件艰苦的工作。
Face the Tough Stuff Head on. If there is something difficult that you must do, just bite the bullet and do it.
迎难而上：如果你面临非常苦难的任务，只能咬紧牙关去做，别推迟。
我们知道这些都很艰难。
我们知道这些都很艰难。
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