Saver Return, Standard Open Return and First Open Return.

有特价往返票，标准不定期往返票和头等不定期往返票。

A) They are frequently scheduled at irregular times.

A）他们经常安排在不定期间。

For this reason, they may disappear for inconsistent periods of time.

因此，它们可能会不定期地消失。

28.cease to track satellite in coastal waters , then return to normal working order in offshore waters.

在近岸丢失跟踪卫星，然后在离岸较远又恢复正常Part C： INMARSAT国际海事卫星系统29。the terminal can not respond any signal unperiodically ，switch off power ，it resumes after 5 seconds不定期出现死机现象，关电源5秒后恢复正常。

Drinking too much alcohol, smoking cigarettes and not brushing your teeth regularly will all make your breath smell.

酗酒抽烟，及不定期刷牙可导致口臭。

Now is it always the same songs, or do the team come up with new songs from time to time?

那你们是会唱同样歌，还是球队会不定期地更换新歌？

In patients who don't take their medication regularly, epilepsy may become refractory and they then have to take lifelong therapy.

在不定期服药中，癫痫可能会变得难治，然后他们不得不接受终身治疗。

Or not to feed them regularly, which is equally bad.

或不定期喂它们， 这同样不好。

If you don't review these words regularly, you're likely to forget them very soon.

如果不定期复习这些单词，你很可能会很快忘记它们。

I do not do this on a regular basis. I do not have this habit.

我不定期这样做。 我没有这个习惯。

It's an indefinite dance battle that's ongoing.

这是一场持续进不定期舞蹈对决。

Finally this week, a story in our occasional destination series.

本周最后，我们带来一次不定期目地系列中故事。

So I post sporadically on Instagram mostly and Sacred Knot Tattoo.

因此，我主要在Instagram上不定期发布内容，也在Sacred Knot Tattoo上发布。

She'll drop in on American Idol periodically.

她会不定期地出席《美国偶像》。

We have it sent to us irregularly.

我们不定期将其发送给我们。

People in a long-distance relationship live very far apart from each other and don't see each other on a regular basis.

异地恋彼此之间相隔遥远，也不定期见面。

Josh, it's a common misconception that, because vaccinated people can get and occasionally die from COVID, the vaccines must not work.

Josh，这是个常见误解：因为已接种可能感染新冠，不定期还会出现死亡，那疫苗肯定不管用。

This will be the fifth collaboration between Zemeckis and Hanks, an irregular series that began with Forrest Gump and Cast Away.

这将是泽米基斯和汉克斯第五次合作，从《阿甘正传》和《荒岛余生》起，他们会进不定期合作。

Animals may live near one another, but never regularly interact.

动物可能住得很近，但从不定期互动。

If you don't review those words regularly, most probably you'll start to forget them very soon.

如果不定期复习这些词汇，很可能很快就会开始遗忘。