unknown term meaning in English

未知项

The students should first underline unknown terms and then mentally confront potential translation difficulties in the text with suitable procedures
学生先划下有难度的词句，然后思考一下解决翻译难点的对策。
Sure , you could just leave this on your shelf as a dusty reference tool , picking it up only on those occasions when you encounter an unknown term or acronym
当然，你也可以将本词典作为一本放在书柜里的尘封工具书，只有在遇到不懂的术语或缩略语时才偶然拾起。
Rule nineteen - using this method of reasoning , we must try to find as many magnitudes , expressed in two different ways , as there are unknown terms , which we treat as known in order to work out the problem in the direct way
在使用推理的方法时，应该以两种不同的方法，尝试发现相同多的数量，如果有未知项的话，我们可以设想为已知项，以便以直接的方式来解决问题。