flip side

柯林斯词典

1. N-SING The flip side of a record is the side that does not have the main song on it. 背面['the' N]
"What's on the flip side?"
“背面是什么？”
2. N-SING The flip side of a situation consists of the less obvious or less pleasant aspects of it. 不明显的一面; 负面
The trade deficit is the flip side of a rapidly expanding economy. 贸易逆差是一次经济快速发展带来的负面产物。