Airlines recommend hard-sided cases for durability.

航空公司推荐使用硬边的提箱以求耐用。

《柯林斯英汉双解大词典》

All these limiting cases are always hard for me to imagine because I never encountered them in the world.

我一直觉得这些限制的很严的例子，难以想象，因为我从未见过这样的例子。

youdao

Over all, then, even as both Ireland and Nevada have been especially hard-luck cases within their respective currency zones, Nevada’s medium-term prospects look much better.

总的来讲，尽管爱尔兰和内华达州在其各自的货币范围内均为非常倒霉的案例，但看来内华达的中期前景要好得多。

youdao

So similarly,there's going to be hard cases about the very,very early stages.

同样，早期阶段也有这样难以解释的例子。

耶鲁公开课 - 死亡课程节选

Well,hard cases there.

这就是很复杂的案例了。

耶鲁公开课 - 死亡课程节选

In cases where you have a hard decision to make, you know you're not racist.

假如你碰上一个难以抉择的情况，你知道你不是种族主义者。

耶鲁公开课 - 心理学导论课程节选

The court also has no choice but to decide hard cases: that is its job.

ECONOMIST: Lexington

But if we really want to do something useful, we should do more than help the hard cases.

CNN: What's the value of immigration?

It would rather pass this hot potato to an inter-agency group that would include the State Department and the Treasury to deal with hard cases.

CENTERFORSECURITYPOLICY: Center for Security Policy | The Economist Labels National Security as New Material Risk Factor In the Offerings of Foreign Firms on U.S. Capital Markets