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Thirdly, [clause]
用于列举论点或步骤中的第三点，常出现在正式写作或演讲中。
Thirdly, we must ensure the project stays on schedule.
第三，我们必须确保项目按时进行。
第三
先理解核心含义，再看它在真实句子里的用法。
第三
In the third place; third in a row.
Thirdly, we must ensure the project stays on schedule.
第三，我们必须确保项目按时进行。
第三；在第三位。
In the third place; third in a row.
第三
in the third place
Firstly, I want to thank everyone; secondly, I will explain the plan; thirdly, we will take questions.
首先，我要感谢大家；其次，我会解释计划；第三，我们将回答问题。
We need to book the venue, arrange the catering, and thirdly, send out the invitations.
我们需要预订场地、安排餐饮，第三，发出邀请函。
She listed her reasons for leaving: the salary was too low, the hours were too long, and thirdly, she wanted a new challenge.
她列出了离职的理由：薪水太低，工作时间太长，第三，她想迎接新的挑战。
用于列举论点或步骤中的第三点，常出现在正式写作或演讲中。
Thirdly, we must ensure the project stays on schedule.
第三，我们必须确保项目按时进行。
通常与firstly、secondly连用，构成清晰的序列。
Firstly, identify the problem; secondly, collect data; thirdly, propose a solution.
首先，识别问题；其次，收集数据；第三，提出解决方案。
Not this
The thirdly point is important.
Use this
The third point is important.
thirdly是副词，不能修饰名词；表示顺序中的‘第三’应使用形容词third。
Not this
I visited China thirdly last year.
Use this
I visited China for the third time last year.
thirdly用于列举观点或原因，表示‘第三点’，而非表示动作的次数。表示‘第三次’应使用‘for the third time’。
Focus on the distinctions below. Other candidates are kept compact until a reliable usage note is available.
第三，
Firstly, we need to plan; secondly, we need to budget; thirdly, we need to execute.
首先，我们需要规划；其次，我们需要预算；第三，我们需要执行。
并且第三
She outlined three reasons: firstly, cost; secondly, time; and thirdly, quality.
她列出了三个理由：第一，成本；第二，时间；并且第三，质量。
按顺序第三
Thirdly in order of priority is customer satisfaction.
按优先顺序第三是客户满意度。
Use thirdly naturally, then get feedback on meaning, tone, grammar, and phrasing.
Revisit a common error or keep this word in your review list.
thirdly 中的 third 即‘第三’，想象列表第三项的序号，记忆时先记 third 再加 -ly。
通常用于正式或书面列举，表示第三点，也可用于口语。
用在列举或论证中引出第三点，属于连接性副词/句子副词，不修饰具体动作。
Dictionary facts from DICTIONARY_API_DEV, ECDICT, WIKTIONARY.