Drop several seeds over the surface of the pot and cover with a thin layer of vermiculite, a substance that can hold air, water and nutrients.

VOA: special.2009.04.21

As we climbed the air grew cooler and the Indian girls on the road wore shawls over their heads and shoulders.

在我们开车向山上爬行的过程中，空气开始,变得凉爽起来，路上的印第安姑娘都披着围巾。

耶鲁公开课 - 1945年后的美国小说课程节选

He bent over the insect and blew a breath of air at it.

VOA: special.2009.05.30

So why spend all the money on it?," TV Marti transmits over-the-air signals from an aircraft, the Aero Marti,two satellites, and the Internet to get programming into Cuba.

VOA: standard.2009.06.18

"It is not just a case of understanding the activity at the volcano itself, what we are also seeing the effect of at the moment are the prevailing weather conditions because we are in a northerly air stream at the moment and that is bringing the volcanic dust from Iceland down over the U.K.

VOA: standard.2010.04.15