范文：
Title: 30 in English
In the English language, the number 30 is written as "thirty." It is a composite number, meaning it is the product of two smaller natural numbers. Specifically, 30 is the result of multiplying 5 by 6. It is also considered a pronic number, which is a number that is the product of two consecutive integers, in this case, 5 and 6.
In numerical order, 30 is the 30th number after 29 and the 29th number before 31. It is a moderately large number that often appears in various contexts, such as in counting, measurements, and time. For example, in the United States, 30 is the standard number of minutes in a halfhour period.
The word "thirty" can also be used in various idiomatic expressions, such as "thirty pieces of silver," a biblical reference to the amount of money Judas Iscariot received for betraying Jesus Christ. Additionally, it can be used to describe age, as in "at thirty," referring to someone who is 30 years old.
In summary, "thirty" is a versatile number in English, used in both mathematical and everyday contexts.
常见问答知识清单：
1. 如何用英语表达数字30？
2. 30在英语中是什么词？
3. 30在数学中有什么特殊性质？
4. 30在英语的数值顺序中排在哪个位置？
5. 30分钟在英语中如何表达？
6. 30可以分解成哪两个数字的乘积？
7. 30是哪种类型的数字？
8. 30在英语中有哪些常见的习语？
9. 30在宗教文献中有何特殊含义？
10. 如何用英语询问某人多少岁？
详细解答：
1. 数字30在英语中表达为 "thirty."
2. 30在英语中是 "thirty" 这个词。
3. 30是合数，可以分解为 5 和 6 的乘积。它也是一个类平方数，是两个连续整数的乘积。
4. 在英语的数值顺序中，30排在29之后，31之前。
5. 30分钟在英语中表达为 "thirty minutes."
6. 30可以分解为 5 和 6 的乘积。
7. 30是合数和类平方数。
8. 30在英语中可以用于习语，如 "thirty pieces of silver"（三文钱）。
9. 在宗教文献中，“三十块银币”是关于犹大出卖耶稣的故事中的金额。
10. 用英语询问某人多少岁可以说 "How old are you?" 或者 "How many years old are you?"
