flippant

例句：

1. 1. The waiter was so flippant that he didn't even notice the guests arriving.
   服务员太轻率了，以至于没有注意到客人的到来。
2. 2.She was a bit flippant about the situation, which made her friends uncomfortable.
   她对情况的态度有些轻率，这让她的朋友说不舒服。
3. 3. He was so flippant about the topic of politics that it made him seem uninterested.
   他对政治话题的态度轻率到让人感觉他不感兴趣。