用于菜单、按钮和说明。你的学习内容将保持英语。
/ˈsæd/
feeling unhappy or sorrowful
“The dog looked sad when his owner left the park.”
Feeling fear or anxiety about something.
Feeling strong annoyance or displeasure.
Feeling worried or uneasy.
feeling embarrassed or guilty
Feeling sure about oneself or a situation.
eager to learn or know something.
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