/ˈʌndəˌbelɪ/ n.( 复underbellies)1.(vulnerable part)薄弱部分；弱点
the legal system's underbelly法律体系的弱点
soft underbelly软肋
The ANC are attacking rugby because it is the soft underbelly of South African sport.非国大正在拿橄榄球说事, 因为它是南非体育的软肋。
2.+of animal下腹部
3.+of vehicle底部；底盘
The missiles emerge from the underbelly of the transport plane.导弹从运输机的底部露出。