open sentence中文什么意思

【数学】开句〔包含着一个或一个以上未知量的数学方程式〕。

• open:    adj. 1.开着的，开放的；可进入 ...
• sentence:    n. 1. 【法律】宣判；判决。 2 ...
• in a sentence:    在句中; 在一个句子中

例句与用法

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1. Pay particular attention to the opening sentence
   要特别注意写好开头一句话。
2. Write five opening sentences which could be used in letters to friends or relations
   写出5句给朋友或亲属的信的开头语。
3. When we had lunch with him there were probably 6 others sitting around the table and he turned to us and he said , " lenin told mekk . " how about that for an opening sentence to get your attention
   我跟他一起进午餐，当时还有六个人同席，他对我们说：列宁告诉我，这一句开场白能得到你注意吗？

百科释义

In mathematics, an open sentence (usually an equation or equality) is described as "open" in the sense that its truth value is meaningless until its variables are replaced with specific numbers, at which point the truth value can usually be determined (and hence the sentences are no longer regarded as "open"). These possible replacement values are assumed to range over a subset of either the real or complex numbers, depending on the equation or inequality under consideration (in applications, real numbers are usually associated also with measurement units).