hards的用法和樣例：
例句
- I'd like to take this opportunity to thank everyone for their hard work on the project.
我愿借此機會感謝每一位為這個項目辛勤工作的人。 - He had a hard time selling his car, but he finally nailed down the sale when he got his friend John to give him$500.
他原先賣不掉他的汽車，但他的朋友約翰給了他500美元，終于把這宗買賣定了下來。
