参见：天空[tiānkōng]

• 抬头望天

  raise one's head to the sky

• 天朗气清

  clear and bright

• 天阴下来了。

  The sky became overcast.

• 天上阴云密布。

  The sky is overcast with clouds.

• 我天黑以前就走到了。

  I got there before it got dark.

• 蓝蓝的天上白云飘。

  There are white clouds drifting in the blue sky.

• 这时天上没有月亮，很黑。

  There is no moonlight now. The sky is very dark.

• 两种社会两重天

  two societies, two entirely different worlds

位于顶部的，凌空架设的overhead

一昼夜；白天day; daytime

• 第二天

  second day

• 过几天

  after a few days

• 一天一天地

  day by day

• 他忙了一天。

  He had a busy day.

• 一天有二十四小时。

  There are twenty-four hours in a day.

时间a period of time in a day

• 天还早呢。

  It's still early.

• 天快黑了

  it is getting dark

季节season

• 冷天

  cold season

• 春天

  spring

• 三伏天

  dog days

天气weather

• 天冷

  have cold weather

• 天热

  have hot weather

• 天阴

  have cloudy weather

• 天晴

  have clear skies

• 天旱

  have a drought

• 天干燥

  have dry weather

自然nature

天然的，天生的natural

指自然界的主宰者God

• 对天立誓

  swear to God

指神佛仙人的居住地Heaven

指赖于生存的事物<书>necessities of life

• 民以食为天。

  Food is the basic need of man.