a. not usual or common or ordinary
s. not commonly encountered
a. 不寻常的, 罕见的, 与众不同的
1. The weather today is quite unusual for this time of year.
今天的天气在这个季节是相当不寻常的。
2. She has an unusual talent for painting.
她有一种不寻常的绘画天赋。
3. It's unusual to see so many people in the park on a rainy day.
在雨天看到这么多人在公园里是很不寻常的。