歧义句是指一句话有两种或几种可能的解释。科技文稿中的歧义句，无论对作者，对编者，还是对读者，都是一种困扰。歧义句应视为语言表达中的一类弊病，当为科技写作中一个值得重视的问题。１时空、数量条件交待不清造成歧义例１提倡横排。确需竖排时，文中所涉及的数字除... Ambiguous sentences mean that there are two or more possible explanations of a sentence. Ambiguous sentences in scientific and technical manuscripts are troubling both to authors, to editors and to readers. Ambiguity sentences should be regarded as a kind of ills in language expression, which is a worthy issue in the writing of science and technology. 1 space-time, the number of conditions confused to explain ambiguous Example 1 to promote horizontal arrangement. Indeed need to vertical row, the text involved in the number of divisions ...