s. paying close attention especially to details
s. quick to notice; showing quick and keen perception
a. 严格遵守...的, 留心的, 当心的, 观察力敏锐的, 注意观察的
[法] 注意的, 留心的, 严格遵守的
1. She is very observant and notices details that others often miss.
她非常善于观察，注意到其他人常常忽略的细节。
2. Being observant can help you learn more about the world around you.
善于观察可以帮助你更多地了解周围的世界。
3. The detective was observant enough to find clues that led to the solution.
侦探足够细心，找到了导致案件解决的线索。