Flags and bunting hung limply in the still, warm air.

旗子和飘带在静止、温暖的空中无力地垂着。

《柯林斯英汉双解大词典》

Researchers have still to decide whether smell is one sense or two—one responding to odours properly and the other registering odourless chemicals in the air.

研究者们还需要判断嗅觉到底是一种还是两种感觉，一种感觉回应气味本身，另一种感觉记录空气中无味的化学成分。

youdao

Our travel plans are still up in the air.

我们的旅行计划尚未决定。

《牛津词典》

But Steven Slater is in a lot of legal trouble and details of exactly what happened on that JetBlue flight and how he acted are still up in the air.

VOA: special.2010.08.13

I've already suggested that in a variety of ways this is a response that can be naive but it is still very much in the air.

我已经暗示过，在各种各样的方式里,这个是一种天真的响应，但是仍然有很多这种声音存在。

耶鲁公开课 - 文学理论导论课程节选

The Paris Air Show ends Sunday which still gives Boeing time to catch up to rival Airbus in securing new aircraft orders.

VOA: standard.2009.06.16

Dragonflies hover in the still air.

BBC: On holiday in North Korea

The worry, born in the Nasdaq crash in the spring, is still in the air.

FORBES: Side Lines

How Proactiv, which has made its name in the infomercial arena, will respond to this shift in coming years is still up in the air, but Renker agrees the role of social media seems on track to becoming increasingly important.

FORBES: Proactiv's Active Ingredient: Celebrity