each according to his ability; 各盡所能
lacking in ability; incompetent; 無能
electric [electrical] energy; 電能
chemical [atomic] energy; 化學[原子]能
able person; man of large calibre 能人
The patient was but poorly able to sit up. 病人僅能勉強坐起來。
It was felt that she was perfectly capable of taking care of herself. 人們認為她完全能照顧自己。
Nai Yuanhao 能元皓
牛津高階第八版
美國韋氏詞典
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維基百科 (自由的百科全書)