单词学习：collectedness 名词
collectedness
/kəˈlektɪdnəs/
镇定，泰然自若；心神专注
Gu Laoshi maintained her collectedness throughout the challenging debate, which impressed everyone.
顾老师在充满挑战的辩论中始终保持镇定，这给所有人留下了深刻印象。
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