| 1. 劍橋英英字典 principal principal |
2. 雅虎奇摩字典 principal |
3. 韋氏線上字典 principal |
4. 朗文英英字典 principal |
| 5. Google字典 principal |
6. icibt寫作句庫 principal |
7. 美國遺產字典 principal |
8. wiktionary principal |
| 9. Wikipedia principal |
10. Howstuffworks principal |
11. Urban Dictionary principal |
12. EarthSky principal |
| 13. answers.com principal |
14. WordReference.com principal |
15. 英漢詞典 principal |
16. yourdictionary.com principal |
| 17. Webster Dictionary principal |
18. onelook.com principal |
19. W3dictionary principal |
20. Medlineplus dictionary principal |
| 21. Inogolo(名字發音) principal |
22. Forvo(發音) principal |
23. Quotations(語錄) principal語錄 |
24. 韋氏線上學生字典 principal |
| 25. 韋氏線上學生詞典 principal |
26. 韋氏線上押韻字典 principal |
27. Thesaurus.net同義字典 principal |
28. Macmillan Dictionary principal |
| 29. Macmillan Thesaurus principal |
30. getwords.com principal |
31. bettermedicine.com principal |
32. Collins principal |
| 33. Oxford Dictionary principal |
34. Oxford ALD principal |
35. ozdic.com principal |
36. Oxford American principal |
| 37. Stanford Encyclopedia of Philosophy principal |
38. 圖片搜尋 principal |
39. PDF搜尋 principal |
40. SWF搜尋 principal |
| 41. English-cobuild principal |
42. Babylon English principal |
43. Babylon Search principal |
44. AlphaDictionary principal |
| 45. 線上英漢字典 principal |
46. Wordnik principal |
47. 同義與反義字 principal |
48. howjsay . com principal |
| 49. Medical Dictionary principal |
50. Your Dictionary Sentences principal |
51. PronounceHow principal |
52. Dictionary Reverso principal |
| 53. Memidex(發音) principal |
54. dict.cc principal |
55. Name Pronunciation principal |
56. Vocabulary.com principal |
| 57. WebMD principal |
58. 海詞 principal |
59. 新浪香港 principal |
60. Linguee principal |
| 61. VoiceTube principal |
62. 大詞典 principal |
63. sentencedict.com principal |
64. definition-of.com principal |
| 65. YouTube principal |
66. 詞都 principal |
67. 押韻詞典 principal |
68. RhymeZone principal |
| 69. RhymeZone principal |
70. 漢語詞典 principal |
71. Pronounce Names principal |
72. Youglish principal |
| 73. 查文法 principal |
74. Purdue OWL principal |
75. Reference.com principal |
76. Ozdic.com 語詞搭配 principal |
| 77. OXFORD 語詞搭配 principal |
78. YARN movie clips principal |
79. Ted.com principal |
80. thesaurus.plus principal |
| 81. cliffsnotes principal |
82. sparknotes principal |
83. Describing Words principal |
84. Ludwig principal |
| 85. study.com principal |
86. webmd.com principal |
87. word hippo(adj) principal |
88. word hippo(noun) principal |
| 89. word hippo(verb) principal |
90. word hippo(adv) principal |
91. word hippo(singular) principal |
92. word hippo(pl.) principal |