single

only, single, sole, unique, alone

这些形容词均可表示“唯一的”之意。
only: 普通用词，常可与sole换用，但侧重仅限于指定的人或物，而不需要更多。
single: 语气较强，强调仅此一个，再无第二个。
sole: 语气强于only，指仅有一个或一群，只考虑这一个或这一群。
unique: 非正式用词，侧重在一类中唯一无可匹敌、无与伦比的特征。
alone: 着重专指某人或某物，而不是别的。

virgin, maiden, single

这些名词均含“未婚者，孤身一人”之意。
virgin: 通常指未婚者，贞洁未被玷污的人，或指婚烟关系尚未完成者。
maiden: 与virgin含义相近，但更着重年轻与未婚，或未曾发生过任何两性关系。
single: 指尚未结婚的人，但更多指终生不结婚的人。

名词 single:

1. a base hit on which the batter stops safely at first base
   同义词：bingle
2. the smallest whole number or a numeral representing this number
   同义词：one, 1, I, ace, unity

动词 single:

1. hit a single

形容词 single:

1. being or characteristic of a single thing or person
   同义词：individual
2. used of flowers having usually only one row or whorl of petals
3. existing alone or consisting of one entity or part or aspect or individual
4. not married or related to the unmarried state
   同义词：unmarried
5. characteristic of or meant for a single person or thing
   同义词：individual, separate
6. having uniform application
7. not divided among or brought to bear on more than one object or objective
   同义词：undivided, exclusive

1. The entire content of a book will be located on a single silicon chip.
   整本书的内容只用一片硅芯片就可以装下。
2. I don't care one single hoot what you said about him; I like him.
   你说的关于他的话我一点也不在乎，我就是喜欢他。
3. The unification of Italy resulted in a single country instead of several kingdoms.
   意大利统一的结果是出现了一个国家，而 不是好几个王国。
4. Is the material single width or double width?
   这幅料子是单幅的还是双幅的？
5. The tariff at the hotel ranges from 20 dollars to 50 dollars a day for a single room.
   旅馆的单人房间的价钱每天从20美元到50美元不等。
6. The tax threshold for a single pensioner is 450 dollars.
   单身养老金领取者的征税起点是450美元。
7. The letter was written on a single sheet of paper.
   这封信只用一张纸写成。