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.