explore,investigate,examine,inquire有什么区别

explore
及物动词 vt.
1.探测;探勘;在...探险
They explored this desert region in 1923.
他们于一九二三年在这荒漠地区探险.
2.探究,探索
The conference explored the possibility of closer trade links.
大会探讨了在贸易上进一步加强联系的可能性.
不及物动词 vi.
1.探索;考察;探勘;探险
examine
及物动词 vt.
1.检查;细查;诊察
The doctor examined the boy and found there was nothing the matter with him.
医生检查了男孩的身体发现他是健康的.
2.审问;盘问[(+on)]
The lawyer examined the witness.
律师讯问了证人.
3.测验[(+in/on)]
The teacher examined the students in physics.
教师考学生物理.
不及物动词 vi.
1.检查,调查
investigate
及物动词 vt.
1.调查,研究
The detective was sent to investigate the crime.
那位侦探被派去调查该罪行.
不及物动词 vi.
1.调查,研究[(+into)]
The principal promised to investigate into that affair.
校长答应去调查那件事情.
inquire
及物动词 vt.
1.讯问;查问;调查[+wh-]
She inquired why he had not thought of that before.
她查问为何他以前没想到那一点.
不及物动词 vi.
1.询问;调查[(+about/into)]
Why don't you inquire by telephone?
你为何不打电话询问?