对三头阿拉斯加的黑熊的心率追踪显示出它们在冬眠前的平均每分钟 55 下降低到了冬天里每分钟飘忽不定的 14 下。

Heart rate tracking for three of the Alaska bears showed a drop from 55 beats per minute on average before hibernation to 14 erratic ones per minute in winter.

youdao

你曾否追逐过飘忽不定的蝴蝶。

Ever followed a butterfly's erratic flight.

youdao

关于他观点飘忽不定的抱怨呢？

What about the complaint that he has no fixed convictions?

youdao