今天 / 本想 / 出去 / 野餐 / 谁知 / 天公不作美 / 下起 / 了 / 大雨

今天本想出去野餐，谁知天公不作美，下起了大雨。

We had planned to go on a picnic today, but Heaven was uncooperative and it started to rain heavily.