X

noun

1. 英语字母表的第24个字母
   the 24th letter of the English alphabet
   1. ‘Xylophone’ begins with (an) X/‘X’.
      xylophone一词以字母x开头。
2. （代表未知数）
   used to represent a number whose value is not mentioned
   1. The equation is impossible for any value of x greater than 2.
      当x的值大于2时，这个等式不成立。
3. 未知的人（或数、影响等）；未指明的人（或数、影响等）
   a person, a number, an influence, etc. that is not known or not named
   1. Let's suppose X knows what Y is doing.
      假设X知道Y正在干什么。

symbol

1. （罗马数字）10
   the number 10 in Roman numerals
2. （置于书信等的结尾，表示亲吻）
   used to represent a kiss at the end of a letter, etc.
   1. Love from Kathy XXX.
      爱你的凯西，吻你，吻你，吻你。
3. （在选举中表示投给某人的一票）
   used to show a vote for sb in an election
   1. Write X beside the candidate of your choice.
      在你选择的候选人旁边打一个X。
4. （表示书面答案是错的）
   used to show that a written answer is wrong
5. （用以标明方位，如在地图上）
   used to show position, for example on a map
   1. X marks the spot.
      X标出了所说的地点。

1. 英语字母表的第24个字母
   X is the twenty-fourth letter of the English alphabet.
2. （用于度量单位间）表示“乘以”
   When writing down the size of something, you can use x in between the measurements to mean 'by'.
   1. The conservatory measures approximately 13ft x 16ft.
      温室的大小大约是13英尺乘16英尺。
3. N-PROPER （用于表示不知道或不愿透露的人名）某，X
   X can be used to represent the name of a person when you do not know their real name, or when you are trying to keep their real name a secret.
   1. ...Dr. X.
      某医生
4. （用于表示不确定或无需指明的数量）
   You can use X or x to refer to a number or amount when you do not know exactly how much it is, or when this information is not important.
   1. You can only make X amount of dollars a year.
      你一年只能赚那么多钱。
5. （用于书信或书面留言末尾，表示亲吻）
   x is used to represent a kiss at the end of a letter or written message.
6. （用于在地图上标明确切方位）
   People sometimes write X on a map to mark a precise position that they want to refer to.

1. The conservatory measures approximately 13ft x 16ft.
   温室的大小大约是13英尺乘16英尺。
2. You can only make X amount of dollars a year.
   你一年只能赚那么多钱。
3. The Jane's 'Triple X Album' came out in 1986, and wasn't much cop actually.
   简在1986年推出了《XXX》专辑，但事实上并不怎么样。
4. Filmmaking was transformed by digital editing, digital f/ x, and digicams.
   数字剪辑、数码特效以及数码摄像机改变了电影摄制方式。
5. The company's latest newcomer is a 4 x 4 estate with a 2.2 litre petrol engine.
   公司最近新到了一辆有2.2升汽油发动机的4x4客货两用车。
6. X-rays can penetrate many objects
   X射线能够穿透很多物体。
7. For a decade 'X' was the pre-eminent punk band in Los Angeles.
   10年来，“X”乐队一直都是洛杉矶最杰出的朋克乐队。
8. It will only register on sophisticated X-ray equipment
   只有精密的X射线仪器才能显示出来。
9. You might still want to go for an X-ray, however, just to be on the safe side.
   不过，为稳妥起见，你可能还想要照一个X光。
10. Vast amounts of energy, from X-rays right through the spectrum down to radio waves, are escaping into space
    大量的能量，从X光直到无线电电波，都正被泄露到太空中去。
11. A neutron star has a gravitational field strong enough to generate X-rays.
    中子星上存在强大的重力场，足以产生X射线。
12. He has even had the temerity to invoke the names of Martin Luther King Jr and Malcolm X in defence of his actions.
    他竟然敢搬出马丁·路德·金和马尔科姆·艾克斯的名字来为自己的行为辩解。
13. If necessary X-rays and blood tests will also be used to aid diagnosis
    如有必要，还要进行X光检查和验血以帮助诊断。
14. Let x be the equal of y.
    设x等于y。
15. Suppose the width of a rectangle is x metres.
    设长方形的宽是x米。
16. A high beam energy is also used to stimulate X-ray emission of higher-energy peaks.
    高能量电子束也能用来激发高能量x射线峰的发射。
17. Select ( what is) x, and reject ( what is) y.
    取其x，弃其y。
18. Human X and Y chromosomes behave differently from the autosomes.
    人的x和y染色体跟常染色体有不同的活动。
19. Plot distance on the vertical Y-axis against time on the horizontal x-axis.
    以垂直y轴表示距离，而以水平x轴表示时间。
20. The scanning electron microscope provides information on chemical composition by use of X-ray spectrometer attachments.
    扫描电子显微镜能利用x射线谱仪的附件来提供化学组分的信息。
21. I use X, Y, and Z axes to illustrate pictures in the three-dimensional space.
    我使用X、Y和Z轴在三维空间中展示图片。
22. The XPath expressions ( x!= y) and not ( x= y) are different.
    XPath表达式（x！=y）和not（x=y）是不同的。
23. This causes an X lock to be immediately taken on the table.
    这将导致表上立即上了一个X锁。
24. X uses this mode.
    X就使用了这种模式。
25. This is equivalent to the statement x^= y in C.
    等价于C中的x^=y语句。
26. The x and y values to add are specified in the URL.
    在URL中指定了要添加的x和y值。
27. Assume myLabel's x and y coordinates are40 and30, respectively.
    假设myLabel的x和y坐标分别为40和30。
28. What are Theory X and Theory Y?
    什么是X理论和Y理论？