Tetrads
四色相(等间隔)配色
🗣️ 情景例句
What do you do in your spare time?
你在业余时间做什么？
That's the way I look at it, too.
我也是这么想的。
Finding planets is proving hard enough, but finding life on them will prove infinitely more difficult.
寻找行星证明相当困难，但是要在行星上发现生命会变得无比艰难。