conclude 有两个方向：①得出结论（conclude that... = 推断出……，conclude from = 从……得出结论）；②结束/终止（the meeting concluded at 5 pm = 会议于下午五点结束，比 end 更正式）。议论文中最高频的是①——通过分析推导出结论。注意：conclude that 的主语可以是「人」，也可以是「研究/报告」；conclusion 是其名词形式，draw/reach a conclusion 是核心搭配。
释义
1
v.得出结论（conclude that）
After examining the evidence, the researchers concluded that the drug was effective.
检查证据后，研究人员得出结论，该药物是有效的。
2
v.结束；终止（较正式）
The conference concluded with a panel discussion on future challenges.
会议以一场关于未来挑战的小组讨论结束。
语感
conclude that = 经过推理/证据得出结论，比 think / decide 更书面，暗含逻辑依据
得出结论推断结束（较正式）
名词 conclusion 的两个核心搭配：draw/reach a conclusion = 得出结论；come to the conclusion that = 得出……的结论。区别：conclude（经过分析推导）vs decide（做出决定）vs determine（确定/测定）。写作中：「In conclusion」是议论文结尾段的标准开头语，但过度使用会显得公式化；更高级的替换是 「Overall」或「Ultimately」。
陷阱
⚠️conclude that vs decide to 的场景区分
✗
After the meeting, the team concluded to adopt the new strategy.
会议结束后，团队决定采用新策略。
conclude 后接 that 从句（推断结论），不接不定式；「决定做某事」用 decide to do
✓
After the meeting, the team decided to adopt the new strategy.
会议结束后，团队决定采用新策略。
⚠️In conclusion 不是 in the conclusion
In conclusion, the evidence suggests that early intervention is more effective.
✗
应该是 in the conclusion 或 at the conclusion
✓
In conclusion 是固定短语，无冠词，用于文章/演讲的结尾总结；「in the conclusion」不是标准用法