她又想去，又不想去，拿不定主意。

She couldn't make up her mind whether to go or not.

《新英汉大辞典》

他想吃，又不想吃，拿不定主意。

He couldn't make up his mind whether to eat or not.

youdao

而当我试图抓住那飘忽不定的形象时，它们又不断变幻着向画面深处退去。

However, the floating images would withdraw into the depth of the painting when I make an attempt to reach them.

youdao

Most of those who attempt to sell too late and buy too late and do both too often, incurring heavy expenses and developing too unsettled and speculative state of mind."

大多数试图晚卖或晚买的人,或者经常既晚卖又晚买的人会损失惨重,而且变得心神不定还特别喜欢投机

耶鲁公开课 - 金融市场课程节选