They were in seventh heaven. They were on cloud nine.

他们简直非常愉快(in seventh heaven)，欣喜若狂(on cloud nine)。

Everyone is on high alert. They've raised the terror alert here in France.

所有人都处于高度警戒状态。法国已经提高了恐怖警戒级别。

He is on the threshold of success.

他即将成功。

Frost are ice crystals on a frozen surface.

霜就是冻结上的冰晶。

I am on the honor roll this semester.

这学期，我优等生的名单内了。

The cakes are on the plates. The plates are on the table.

蛋糕盘子里。盘子桌子上。

Everyone's eyes were now on Lupin, who looked remarkably calm, though rather pale.

现大家的眼睛都转向了卢，卢尽管相当苍白，却很镇静。

Seven are on administrative leave right now.

目前七名涉事警察正休行政假。

Yes, your laptop is on the chair.

是的，你的笔记本电脑椅子上。

A rescue team was on a training mission nearby when that accident occurred.

事故发生时，一组救援部队正附近接受训练。

On the warmer plains and valleys that surround the plateau, grazers are on the move.

高原周围温暖的原和山谷, 食草动物都前进。

The Howler was obviously still on his mind.

那封吼叫信显还盘桓他脑海里。

But we're on course for about four degrees.

但是全球变暖正接近于大约4摄氏度。

Today the species is on the brink of extinction.

如今，它已成为濒危物种。

Begin each day, as if it were on purpose.

像是有目标有计划的开始每一天。

She was on a roll when she made that honor roll.

她获得这些翻滚的记录同时也获得一连“翻”的胜利。

He was on the point of kissing that tempting mouth, but stopped himself.

他差点就要亲吻那张充满诱惑的小嘴了，但他抑制住了自己。

But they were still on borrowed time.

而，它们也只不过是苟延残喘（靠借来的日子活命）而已。

You weren't drunk! That was your brain on autopilot.

你没喝醉 ！是你的大脑自动模式。

The franchised store is on the second floor.

专卖店2楼。