nonchalant

冷淡的，漠不关心的英释中释adjIf you describe someone as nonchalant, you mean that they appear not to worry or care about things and that they seem very calm

1 Clark's mother is nonchalant about her role in her son's latest work..克拉克的母亲对她在儿子最新作品中的角色反应平淡。

2 Denis tried to look nonchalant and uninterested..丹尼斯尽力作出冷淡、不感兴趣的样子。