| 51. | an impenetrable difficulty, mystery , problem, etc |
| 无可克服的困难, 难解之谜, 百思莫解的问题
|
| 52. | an indefinable air of mystery |
| 不可言状的神秘气氛
|
| 53. | a novel of mystery and intrigue |
| 有神秘和阴谋情节的小说
|
| 54. | an insoluble problem, mystery , riddle, etc |
| 不能解决的问题, 无法解释的奥秘, 不解之谜
|
| 55. | clear up a mystery , difficulty, misunderstanding, etc |
| 清除疑团, 解决困难, 解除误会
|
| 56. | a deep mystery , secret, etc |
| 难以理解的奥妙, 难以发现的秘密
|
| 57. | get to the heart of the matter, subject, mystery |
| 把握住事情, 问题, 难解事物的实质
|
| 58. | anything not properly understood or difficult to understand; mystery |
| 奥秘; 神秘的事物
|
| 59. | a crime shrouded in mystery |
| 笼罩在神秘气氛中的罪案
|
| 60. | a mystery book |
| 侦探小说
|