形容词
中文翻译：困难的
同义词：
['tricky', 'tough', 'hard']
例句：
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1.It's difficult to find a parking spot in this busy city.
在这个繁忙的城市里，找到停车位很难。
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2. The task ahead is difficult and requires careful planning.
前方的任务困难且需要仔细规划。
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3. The journey was difficult, but the scenery was breathtaking.
旅程很艰难，但风景令人叹为观止。