| 41. | a complex system, network, etc |
| 联合的体系, 网等
|
| 42. | a complex argument, theory, subject, etc |
| 复杂的论证, 理论, 学科等
|
| 43. | a person with a complex social background |
| 社会背景复杂的人
|
| 44. | a human brain is a complex organ |
| 人的头脑是一个复杂的器官
|
| 45. | a complex motive |
| 复杂的动机
|
| 46. | a highly complex mechanism of the United Nations |
| 联合国的一个十分复杂的机构
|
| 47. | the complex life of a great city |
| 大城市的复杂生活
|
| 48. | a complex subterranean network |
| 复杂的地铁网
|
| 49. | interpret these complex phenomenon |
| 解释这些复杂现象
|
| 50. | a large apartment complex |
| 大型公寓住宅群
|