grate upon的用法和样例：
例句
- Thrill-seekers descended upon the scene of the crime.
寻求刺激者急速接近犯罪现场。 - Upon realizing that she and Guang Wan have been conned by the estate agent, Yun Zhi passes out on the spot.
允智发觉他们已经受骗，结果因受不了刺激而当场昏倒。
词汇搭配
- grate upon the ear 叫人听起来不愉快...
