n. lack of ability (especially mental ability) to do something
n. lacking the power to perform
n. 无能, 无力
1. His inability to speak in public made him feel nervous during the presentation.
他在公众场合发言的无能让他在演讲时感到紧张。
2. The team's inability to score goals cost them the game.
球队无法进球让他们输掉了比赛。
3. She struggled with her inability to understand the complex math problems.
她在理解复杂数学题的无能上感到困难。