adj.未注意到的；不遵守（规则、惯例等）的，不留心的

She was so unobservant that she didn't notice the changes in her surroundings.
她如此粗心大意，以至于没有注意到周围的改变。
The teacher scolded him for his unobservant behavior during the lecture.
老师因他在讲座中的粗心大意行为而责备了他。
His unobservant nature made it difficult for him to spot the flaws in his own work.
他的粗心大意使得他很难发现自己的工作中的瑕疵。
The chef was unobservant of the food safety guidelines, leading to a health scare.
厨师对食品安全指南的忽视导致了一场健康危机。
It was surprising how unobservant he was when it came to noticing the small details.
他居然能忽略那些小细节，这真是令人惊讶。
She was often criticized for being unobservant in her interactions with others.
她在与人交往时常常因为粗心大意而受到批评。
The scientist was known for his keen observations, unlike his unobservant colleague.
这位科学家以其敏锐的观察力闻名，而他的同事则恰恰相反。
Despite his years of experience, he remained unobservant of the new trends in the field.
尽管他有多年的经验，但仍然对领域内的新趋势视而不见。
The unobservant student missed out on many important points during the class discussion.
粗心大意的学生在课堂讨论中错过了许多重要的点。
His parents were worried about his unobservant behavior, fearing it might lead to accidents.
他的父母担心他的粗心大意行为，害怕这可能会导致事故。