[化] 未知量

词型变化：名词复数形式 : unknown quantities

unknown quantity的用法和样例：

例句

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。
The new sales director is still a bit of an unknown quantity.新来的销售部主任大家还不大了解。

词汇搭配

an unknown quantity未知量
unknown quantity难预测的人

【近义词】

unknown未知的

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