176. in the air, on the air, in the sky
in the air正在酝酿中；
on the air播送，广播；例：His show is on the air at 6:00 tonight.
in the sky在天空中
177. in the field, on the field
in the field在野外；
on the field在战场上 例：He lost his life on the field.
178. in the market, on the market
in the market表示场所或地点，在市场上；例：He sells fish in the market.
on the market出售 例：Fresh vegetables are on the market now.
179. in the sun, under the sun
in the sun在阳光下；
under the sun地球上，全世界 例：people under the sun
180. in a voice, with one voice
in a voice出声地；
with one voice异口同声地 例：They refused with one voice.