I've been on a roller coaster of emotions since I've been here.

自从我到了这里，情绪就像过山车一样起伏不定。

金山词霸

I began my sailing adventures on a yacht with a temperamental petrol engine.

我最初的航海冒险是在一艘装有性情不定的汽油发动机的游艇上开始的。

金山词霸

Glimmering faintly, the erratic flames swayed unsteadily.

火光微弱地闪烁，不规则的火焰摇曳不定。

金山词霸

With the markets being so volatile, investments are at great risk.

由于市场那么变化不定, 投资冒着很大的风险.

《简明英汉词典》

Phil walked forward confidently but something held Ben back.

菲尔信心十足地走向前去,本却踌躇不定.

《简明英汉词典》

It's not at all certain whether I'll come tomorrow.

我明天还不定来不来呢.

《现代汉英综合大词典》

It's hard to predict how things will turn out.

事情还不定怎样呢.

《现代汉英综合大词典》

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

她又想去,又不想去,拿不定主意.

《现代汉英综合大词典》

I don't know how many times he comes a day.

他一天不定来多少次.

《现代汉英综合大词典》

The breeze flared the candle.

微风吹得烛光不定.

《简明英汉词典》

We hesitated at the propriety of the method.

我们对这种办法是否适用拿不定主意.

《简明英汉词典》

The heavy rain might settle the changeable weather.

这场大雨也许能使变幻不定的天气稳定下来.

《简明英汉词典》

He has knocked around quite a bit.

他经历过很多漂泊不定的生活.

《简明英汉词典》

I wandered lonely like a cloud.

我像一朵浮云般漂浮不定.

《简明英汉词典》

The candle flickered and then went out.

一开始蜡烛摇曳不定,然后就灭了.

《现代汉英综合大词典》