"无奈的眼神"可以用英文表示为"resigned eyes"或"defeated eyes".
"无奈"这个词本身就是指无助或无可奈何的感觉，因此可以用"resigned"或"defeated"来表示。这两个词都指的是一种放弃或失败的感觉。
下面是一些例句和翻译：
She looked at him with resigned eyes. (她用无奈的眼神看着他。)
He walked away with defeated eyes. (他带着失败的眼神走开了。)
She gave him a resigned look. (她用无奈的眼神看着他。)
He stared at the floor with defeated eyes. (他带着失败的眼神凝视着地面。)