| 单词 | unknown quantity |
| 释义 | DEFINITIVE EXAMPLES 权威例句〔KNOW/NOT KNOW〕The team's new pitcher has never played pro baseball before and is something of an unknown quantity. 该队新加盟的投球手以前从没打过职业棒球赛，他的能力有点难以预料。朗文写作活用〔be〕A is excellent, C is passing. Let n be the unknown quantity.A表示优秀，C表示及格。n表示未知数美国传统〔open sentence〕An expression that contains at least one unknown quantity and becomes true or false when a test value is substituted for the unknown.开语句：至少包含一个未知数并且在测验值被替换时出现对或错的数学方程式美国传统〔quantity〕He is an unknown quantity for his rivals.对于对手们而言，他是个未知数。柯林斯高阶〔quantity〕He is an unknown quantity for his rivals.对竞争对手而言, 他还是个未知数。外研社新世纪〔quantity〕If you've never been published before, you're an unknown quantity, so you're going to have difficulty selling your first novel.如果你之前从未发表过作品，你就是一位尚不知名的作者，因此要卖掉你的第一部小说将是有难度的。韦氏高阶〔quantity〕To her the outside world was a totally unknown quantity.对她说来,外部世界完全是个未知数。英汉大词典〔successive approximation〕A method for estimating the value of an unknown quantity by repeated comparison to a sequence of known quantities.逐次近似计算法：通过与已知的一系列量进行反复比较而估算一个未知量的值的方法美国传统〔unknown quantity〕The third candidate for the seat is a relatively unknown quantity.竞选党领导的第三个候选人的具体情况相对而言还不甚清楚。剑桥高阶〔unknown quantity〕To Margaret the outside world was an unknown quantity.对玛格丽特而言, 外面的世界是个未知数。外研社新世纪The new teacher is still very much an unknown quantity but we have hopes that he will be a valuable member of our team. 新教师是谁现在还难以预料，但我们希望他会成为我们队里的重要一员。译典通The third candidate for the party leadership is a relatively unknown quantity.党领导的第三个候选人是何许人物相对说来仍是未知数。剑桥国际We use x as the symbol for an unknown quantity. 我们用ｘ表示一个未知数。译典通 |
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