1·It was a tough but clean game.
这是一场打得艰苦但却是规规矩矩的比赛。
—— 《牛津词典》
2·It was a tough race and I had to pace myself.
那是一场艰难的比赛，我必须放稳自己的步调。
—— 《柯林斯英汉双解大词典》
3·He is known for taking a tough line on security.
他以在安全方面采取强硬路线而闻名。
—— 《柯林斯英汉双解大词典》
4·He built up a reputation as a tough businessman.
他树立起了一个坚强生意人的名声。
—— 《柯林斯英汉双解大词典》
5·It was a tough course over a gradual ascent before the big climb of Bluebell Hill.
这是蓝钟山大攀登之前在一段缓坡上的艰难路程。
—— 《柯林斯英汉双解大词典》
6·It's going to be a tough decision.
这将是一个艰难的决定。
7·It's a tough learning curve and it won't always make you popular.
这是一条艰难的学习曲线，且并不一定让你受欢迎。
8·Applying my own rule, I determined to write them in alphabetical, never letting myself leave out a tough idea.
我决定用我自己的规则，把它们按字母顺序写下来，绝不让自己漏掉一个艰难的想法。
9·Actually I've been considering offering extra credit, because I've been having a tough time getting volunteers.
事实上我一直在考虑提供额外的加分，因为我一直很难找到志愿者。
10·The small is $3.50 and the large is $5. It's a tough decision: the small size may not last you through the whole movie, but $5.50 for some sugary drink seems ridiculous.
小杯的3.5美元，大杯的5美元。这就很难决定了：小杯饮料可能撑不了你看完整部电影，但花5.5美元买杯含糖饮料又很荒谬。