Underbelly
n. 下腹部, 薄弱部分
📖 牛津释义
underbelly
n[sing]
1 undersurface of an animal's body, eg as a cut of meat, esp pork（动物的）下腹部（如切下的一块, 尤指猪肉）.
2 (fig 比喻) area, region, etc that is vulnerable to attack 易受攻击的部位、 区域等
The stock-market crisis struck at the soft underbelly of the US economy, eg its trade deficit. 股市危机打击了美国经济的薄弱环节（如贸易逆差）.
🗣️ 情景例句
Sure.
好的。
Do you speak English?
你会说英语吗？
It was upon this principle that the first instruments were made,
据这一原理，制造出了最初的地震仪器，