tough stuff

基本解釋

Lily's sister: We're just having some cola before getting to the tough stuff-math.
莉莉妹妹：我們只是在對付難纏的數(shù)學(xué)之前先喝點可樂。
The fact of the matter is building quality software has and will always be tough stuff.
事實上，編寫出優(yōu)質(zhì)的軟件已經(jīng)成為，且永遠都是一件艱苦的工作。
When researchers broke open the blocks, they got fresh whiffs of petroleum hydrocarbons, Shirley says. "It's tough stuff, that's why we put it on roads."
當(dāng)研究者破開這些塊狀物體，他們得到一點點新鮮的石油烴，雪利說“它是堅硬的物質(zhì)，所以我們用它鋪路。”

So basically, until Drive, Google was attempting to move some pretty tough stuff.
FORBES: Google Drive Could Be Huge
As dozens of new lawmakers are beginning to learn, governing is tough stuff.
FORBES: S&P Misses Most Dangerous Short-Term Risk On U.S. Debt
But then, another four years of tough stuff that we're going to have to do in order to deliver the kind of America we want.
WHITEHOUSE: Remarks by the President at a DNC Event in Washington, DC