tea

In a sentence

• 我喜欢喝茶，每天下午都会泡一杯绿茶。

  I like drinking tea; every afternoon, I brew a cup of green tea.

  In this sentence, '茶' refers to the beverage made from steeping processed tea leaves in hot water.

• 中国是茶叶的故乡，种类非常丰富。

  China is the homeland of tea leaves; the varieties are incredibly diverse.

  '茶' here refers to the plant or processed leaves used to make the tea beverage.

• 请问下午茶的时间是什么时候？

  May I ask when the afternoon tea time is?

  Here, '茶' is a metonym, representing the social activity or meal termed 'afternoon tea'.