listlessness
n. 倦怠；无精打采
近义词：inertia，boredom，torpidness，torpidity，languor，torpor，lassitude，
英英释义
Noun
- a feeling of lack of interest or energy
- inactivity resulting from lethargy and lack of vigor or energy
例句
- Consequently, you may experience fatigue or listlessness without realizing why.因此，你可能会莫名其妙地感到疲劳或无精打采。
- Look for changes in behaviour such as listlessness, withdrawal or aggression, and note even the slightest change.寻找行为的变化甚至是非常细微的改变，例如：无精打采、躲避或攻击行为。