今年は豊作だった。
tbd
We had a good harvest this year.
We had a good crop this year.
We have had a heavy crop this year.
は
1. indicates sentence topic
2. indicates contrast with another option (stated or unstated)
3. adds emphasis
指示句子的主题;表示与另一选项(无论是否明确提及)形成对比;表示强调