我认为使用unless加else条件句就好像在讲双重否定。
I think using unless with else is like speaking with double negatives.
首先，我们构造以目的和背景知识为双条件的条件句系统akc，给出它的一些证明论结果。
Firstly, we construct the conditional system AKC with double conditions for aim and background knowledge, give some results of its proof theory.
Go语言当中的条件句与C当中所熟知的if - else构造一样，但条件不需要被打包在括号内。
Conditionals in Go have the same familiar if-else construction as those in c, but the condition need not be wrapped in parentheses.
西班牙语的动词现在时有六种形态，过去时、未完成时、将来时、条件句、虚拟句以及另外两种过去时虚拟式也各自有六种形态，加起来一共是48种。
A Spanish verb has six present-tense forms, and six each in the preterite, imperfect, future, conditional, subjunctive and two different past subjunctives, for a total of 48 forms.
在条件句中两个分句可以颠倒而句意不变。
The two clauses can be reversed in a conditional sentence with no change in meaning.
在这节写作课上，我们将要练习使用第二条件句。
In this writing lesson, we are going to practice using the second conditional.
本文是从语用认知的视角来探讨元交际条件句的用法。
The present paper aims to explore various USES of meta-communicative conditionals (MCCs) from a cognitive-pragmatic perspective.
如果明天下雪，我们将很高兴。(与将来事实相反的虚拟条件句)。
If it should (If it were to) snow tomorrow, we would be very happy.
Need的助动词形式主要用于现在时态的疑问句、否定句和条件句中。
The auxiliary forms of need are used primarily in present-tense questions, negations, and conditional clauses.
本文提出了变异条件句这个概念，并把一般条件句和变异条件句加以比较。
This paper puts forward the concept of varied conditional sentence and compares the general conditionals with the varied conditionals.
首先，我们构造动态认知条件句系统DEC2，给出它的一些证明论结果。
Firstly, we construct the dynamic epistemic conditional system DEC2, give some results of its proof theory.
首先，我们构造动态认知条件句系统DEC1，给出它的一些证明论结果。
Firstly, we construct the dynamic epistemic conditional system DEC1, give some results of its proof theory.
可以使用半否定、条件句、否定转移、省略、疑问句、婉转暗示和迂回等手段。
The fourth device is by syntax such as partial negation, conditional sentence, transferred negation, ellipsis, interrogative sentences, tactful implication and periphrases.
用词多数比较正式，用语力求准确，多用主动语态、现在时态、直接表达方式和条件句等。
Formal words are used. The language accuracy is required. Active voice, present tense, direct expression and conditional clauses are more frequently used.
利用模糊集合的隶属度函数，模糊条件句和模糊控制规则，实现对一阶线性时滞系统的控制。
Using membership function of fuzzy set, fuzzy condition sentence and fuzzy control rules, the fuzzy controller completes the control of the first-order linear delay system.
由于大部分海事公约的条款是在某些特定条件下才有效，因此条件句在海事公约中的出现频率很高。
As most of the terms are valid only under certain conditions, conditionals are of high frequency in international maritime conventions.
本文旨在对国际海事公约中条件句的翻译进行定量和定性分析，以寻求海事公约中条件句翻译的规律所在。
The thesis is aimed to find some rules and principles in the translation of conditionals in international maritime conventions by applying both quantitative and qualitative methods.
文章指出正确理解、把握、使用开放性If -条件句有赖于对主、从句间语义关系的认识以及具体语境的掌握。
It points out that the correct comprehension of open IF-clause depends on the understanding of the semantic relationship between the main clause and the subordinate clause, as well as the context.
条件隐含在言语片段中，需要经过逻辑分析才能找出来。 本文把这种条件称为隐含条件，并把含有这类隐含条件的句子称为隐含条件句。
Such kind of condition is to be called implied condition and sentences with the said condition are to be called Implied Conditional Sentences in this paper.
条件隐含在言语片段中，需要经过逻辑分析才能找出来。 本文把这种条件称为隐含条件，并把含有这类隐含条件的句子称为隐含条件句。
Such kind of condition is to be called implied condition and sentences with the said condition are to be called Implied Conditional Sentences in this paper.
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