Unless you are trying to lose weight to please yourself, it's going to be tough to keep your motivation level high.

除非你在为了让自己开心而努力减肥，否则要保持驱动力很高将很难。

《柯林斯英汉双解大词典》

Life can be tough for immigrants in America.

在美国的移民生活可能会很艰难。

youdao

Scott Hahn, cofounder with Rogan and Loomstate, which uses all-organic cotton, says high-quality sustainable materials can still be tough to fine.

使用全有机棉的 Rogan 和 Loomstate 的联合创始人 Scott Hahn 表示，仍很难提炼到高质量的可持续材料。

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Beets much larger than that can be tough and have to be cooked for a long time.

VOA: special.2010.03.02

It doesn't matter what's your feeling, just tough out, be a man.

自己什么感受不重要，只要撑住，像个男子汉。

普林斯顿公开课 - 人性课程节选

He had to be a tough businessman to arrive where he is.

足够强硬的人才能达到他的位置

耶鲁公开课 - 金融市场课程节选

There will be tough fighting ahead, and the Afghan government will need to deliver better governance.

WHITEHOUSE: The 2011 State of the Union Address: Enhanced Version

"Finding people to buy Honda will be tough with the way things are, " Saward added.

CNN: Can F1 survive the global economic crisis?

When you play a team like Boston, it's going to be tough to beat them.

WSJ: Bruins eliminate Rangers with 3-1 win in Game 5