努力地用英文怎么说hard

"hard" 这个词来源于古英语，最早的词形是 "hærd"。它的意思有很多，包括坚硬、困难、努力等。

例句：

The rock was hard and difficult to break. (这块岩石很硬，很难破碎。)
She works hard to support her family. (她努力工作来养家。)
It's hard to find a good job in this economy. (在这个经济环境中很难找到一份好工作。)