sky

• 名词，指地球上方的大气层或广阔空间，白天通常呈现为蓝色的穹顶；也可泛指天空、苍穹。

A noun referring to the upper atmosphere or expanse of space above the earth, typically seen as a blue dome during the day.

1. The upper atmosphereA1formal

   The region of the atmosphere and outer space seen from the earth.

   天空

   • The sky is blue on a clear day.
   • Birds are flying high in the sky.
   • The sky turned dark before the storm.

   同义词atmosphereazureblueempyreanfirmamentwelkin

   反义词earthfloorground

2. Weather or climateA2informal

   The appearance of the upper atmosphere as an indicator of weather conditions.

   天空（天气）

   • Look at that cloudy sky; it might rain soon.
   • The sky was clear and sunny all day.
   • A red sky at night is a sailor's delight.

   同义词climateweather