the act of sustaining life by food or providing a means of subsistence;
\\\"they were in want of sustenance\\\"
\\\"fishing was their main sustainment\\\"
造句
用作名詞(n.)
Reliability of theory and sustentation of practice indicate that process design system is viable under the environment of net. 理論的可靠和實踐的支持表明，在網絡環境中構建工藝規程設計系統是完全可行的。
Without matter, there would be no sustentation for function activities. 沒有物質，功能活動就無法維持。