形容词
中文翻译：观察的
同义词：
['attentive', 'vigilant', 'attentive']
例句：
-
1. The scientist is observantof the details in his research.
这位科学家对他的研究细节非常留心。
-
2. Shewas an observantchild who always paid attention toher surroundings.
她是个细心的孩子，总是关注周围的环境。
-
3. Theteacher was very observant of the students' progressduring the lesson.
老师对学生们的学习进度非常留心。