halfhearted

He made a halfhearted attempt to clean his room, leaving most of the mess untouched.

他漫不经心地尝试打扫房间，大部分杂乱都没动。

用法提示：修饰尝试，表示不认真的态度。

The audience gave a halfhearted applause after the speaker's uninspiring presentation.

演讲者的发言平淡无奇，观众报以稀稀拉拉的掌声。

用法提示：修饰掌声，表示缺乏热情的回应。

Even though she promised to help, her halfhearted efforts were not enough to finish the project on time.

尽管她答应帮忙，但她不热心的努力不足以按时完成项目。

用法提示：修饰努力，说明缺乏兴趣和投入。