"As a consequence"表示作为结果或后果，而 "As a consequence of"强调因果关系，并指明造成结果的原因。它们在释义、语法、用法和使用环境上有一些区别。它们在释义、用法、使用环境、影响范围和形象上存在一些区别，具体内容如下所示。
1. 释义区别：
"As a consequence"：作为结果或后果，表示由于某种原因或情况而发生的结果。
"As a consequence of"：由于...的结果或后果，强调因果关系，指明造成结果的原因。
例句：
A: He didn't study for the exam, and as a consequence, he failed.
(他没有为考试学习，结果就是他失败了。)
B: The match was canceled as a consequence of heavy rainfall.
(由于暴雨的原因，比赛被取消了。)
2. 语法区别：
"As a consequence" 是一个短语，作为结果或后果的介词短语。
"As a consequence of" 是由短语 "as a consequence" 和介词 "of" 组成的结构。
例句：
A: He overslept and, as a consequence, missed the bus.
(他睡过头了，结果错过了公交车。)
B: The road was closed as a consequence of the accident.
(由于事故的后果，这条路被封闭了。)
3. 用法区别：
"As a consequence" 可以单独使用，表示结果或后果。
"As a consequence of" 强调因果关系，并提供导致结果的原因。
例句：
A: The factory pollution has caused environmental damage, and as a consequence, stricter regulations have been imposed.
(工厂污染导致环境破坏，作为结果，实施了更严格的法规。)
B: As a consequence of the economic downturn, many companies had to lay off employees.
(由于经济衰退的结果，许多公司不得不裁员。)
4. 使用环境区别：
"As a consequence" 可以用于正式和非正式场合，适用于口语和书面语。
"As a consequence of" 更常见于正式或学术场合，用于强调因果关系和提供详细解释。
例句：
A: He spent all his money on unnecessary things. As a consequence, he couldn't afford to pay his rent.
(他把所有的钱都花在不必要的东西上了，结果就是他无法支付房租。)
B: Pollution levels have increased significantly as a consequence of industrialization.
(由于工业化，污染水平显著增加。)