单词学习：unruffled 形容词 (Adjective)
unruffled
/ʌnˈrʌfld/
平静的，镇定的，不慌不忙的
Despite the sudden technical issue during the online class, Mr. Gu remained completely unruffled and calmly guided the students through the solution.
尽管在线课堂上突然出现技术问题，顾老师依然完全保持镇定，并冷静地引导学生们找到了解决方法。
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