grind for

• 刻苦于

grind for的用法和样例：

例句

1. Find level ground for the picnic table.
   找一处平坦的地面放野餐的餐桌。
2. Early experiments with military rockets prepared the ground for space travel.
   早年对军用火箭进行的实验为发展航天技术奠定了基础。
3. Does desertion ground for divorce?
   被配偶遗弃是离婚的理由吗？
4. This citadel is built on high ground for protecting the city.
   这座城堡建于高处是为保护城市。