困难的用英文怎么说hard
时间：
"hard" 是英语中表示困难的常用词。这个词的来源可以追溯到古英语中的 "hærd"，它的意思最早是指坚硬的、硬的。随着时间的推移，这个词的意思逐渐发展为困难的、艰苦的。
例句：
This math problem is hard. (这道数学题很难。)
It's hard to find a job these days. (现在找工作很难。)
He works hard to provide for his family. (他努力工作来养家。)
例句：
This math problem is hard. (这道数学题很难。)
It's hard to find a job these days. (现在找工作很难。)
He works hard to provide for his family. (他努力工作来养家。)