3-D

abbr. 三維的（three dimensional）

3-dimensional

[醫]三維, 立體

30

thirty

300

three hundred; [電影]斯巴達300勇士

31

thirty-one

32

thirty-two

33

thirty-three

34

thirty-four

35

thirty-five

36

thirty-six

360-degree feedback

n. An assessment technique that involves performance assessment from multiple raters.

37

thirty-seven

38

thirty-eight

39

（網絡聊天數字用語）Thank you.

3G

abbr. 第3代移動通信技術（The 3rd Generation Telecommunication）

3rd

第三(third)

4

four

4-dimensional

4-F

n. [美國英語]；選征兵役制中不及格者免除兵役(者)(指身體、心理、品德等不適于服兵役)的分類

4-H

abbr. head, heart, hands, and health 思維、心靈、手腳、身體四健的

4-hitter

4-membered

40

forty

400

four hundred

41

forty-one

411

four hundred and eleven

42

forty-two

43

num. forty-three

44

forty-four

44th

45

forty-five; [電影]魔鬼交鋒.45

45th

46

forty-six

46th

47

forty-seven

47th

48

forty-eight

48th

49

forty-nine

49th

4th

第四(fourth)

4to

4WD

abbr. 四輪驅動（4 wheel drive）

5

five

5-hitter

5-HT

5-羥色胺（5-hydroxytryptamine）

5-hydroxytryptamine

[醫]血清素，血清緊張素，5-羥基色胺

5-membered

50

fifty

500

five hundred

51

fifty-one

52

fifty-two

53

fifty-three

54

fifty-four

55

fifty-five

55th

56

fifty-six

57

fifty-seven

58

（網絡聊天數字用語）晚安。

59

fifty-nine