A pistol wasn't that hard to hide under a loose shirt.

把一支手枪藏在宽松的衬衣里面并没那么难。

《柯林斯英汉双解大词典》

It is often hard for them to find food, so some animals such as mice collect extra food before winter and hide it.

它们通常很难觅食，所以一些动物会在冬天来临前收集额外的食物并储藏起来，例如老鼠。

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It is hard to hide information from the company.

在公司隐瞒信息是非常困难的。

youdao

Income from labor is hard to hide and easy to tax, as the middle class knows full well.

CNN: Why do the Romneys pay so little in taxes?

In Thailand, politicians have found it hard to hide their pique that America did not come to their rescue last July.

ECONOMIST: And now the political fall-out

Mr. Obama works hard to hide his record and deep-seated agenda.

FORBES: President Obama's Three-Front War On Energy