约户外活动时，最好提前说备用方案：下雨就改商场，太热就改咖啡店。
When planning outdoor activities, it's best to mention a backup plan in advance: if it rains, switch to a mall; if it's too hot, switch to a coffee shop.
When planning outdoor activities, it's best to mention a backup plan in advance: if it rains, switch to a mall; if it's too hot, switch to a coffee shop.