noun 下载 🔗分享 无理数 An irrational number, especially one expressed using the √ symbol. Examples : "In math class, we learned that numbers like √2 and √5 are called surds because they are irrational and written with a square root symbol. " 在数学课上，我们学到像√2和√5这样的数字叫做无理根式，因为它们是无理数，而且是用根号来表示的。 math number 与AI对话词汇游戏阅读练习
noun 下载 🔗分享 清辅音，无声辅音 A voiceless consonant. Examples : "In phonetics class, we learned that "p", "t", and "k" are examples of surds because they are consonants produced without vocal cord vibration. " 语音学课上，我们学到“p”，“t”和“k”都是清辅音/无声辅音的例子，因为它们发音时声带不振动。 phonetics linguistics language grammar word sound 与AI对话词汇游戏阅读练习
