underbelly

n.

下腹部的，物体的下方，易受攻击的地带；

复数：underbellies

1. The underbelly of the plane was seriously damaged in the emergency.
   飞机的腹部在这起事件中严重受损。
2. Your robot infantry will all lock into the underbelly of the enormous transport.
   你的机器步兵会全部挂在大型飞行器的底下。
3. The sick woman complains on acute pain in the underbelly.
   患病妇女说她下腹剧痛。
4. The trade deficit remains the soft underbelly of the US economy.
   贸易赤字仍是美国经济的软肋。
5. The underbelly of the club at the minute needs to be slightly stronger.
   这是俱乐部现在的弱点，而我们不得不变的更强壮些。

Underbelly
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The Weak Underbelly of the West Antarctic Ice-Sheet
Dragon’s underbelly: An analysis of China’s soft power
The Soft Underbelly of American Primacy: Tactical Advantages of Terror
Hard Money's Soft Underbelly: Understanding the Argentine Crisis
Hard Money's Soft Underbelly: Understanding the Argentine Crisis
Medicaid expansion--the soft underbelly of health care reform?
The Argentine Collapse: Hard Money''s Soft Underbelly
What is the evidence for evidence-based treatments? A hard look at our soft underbelly