《三国志·魏书·少帝纪》
景初三年正月初一，明帝病重，齐王被册立为皇太子。
景初三年正月丁亥朔，帝甚病，乃立为皇太子。
In the first month of Jingchu's third year, Emperor Ming became seriously ill, and King Qi was appointed as the crown prince.
<s>[INST] Given the Classical Chinese text: 景初三年正月丁亥朔，帝甚病，乃立为皇太子。, provide a step-by-step translation process to arrive at the English translation. [/INST]
Step 1: Identify the main verb and subject: 立 (appoint) and 帝 (emperor)
Step 2: Determine the time and location: 景初三年正月丁亥朔 (the first month of Jingchu's third year)
Step 3: Identify the object and reason: 为皇太子 (as the crown prince) and 帝甚病 (emperor became seriously ill)
Final English translation: In the first month of Jingchu's third year, Emperor Ming became seriously ill, and King Qi was appointed as the crown prince.</s>
Given the Classical Chinese text: 景初三年正月丁亥朔，帝甚病，乃立为皇太子。, provide a step-by-step translation process to arrive at the English translation.
user
Step 1: Identify the main verb and subject: 立 (appoint) and 帝 (emperor)
Step 2: Determine the time and location: 景初三年正月丁亥朔 (the first month of Jingchu's third year)
Step 3: Identify the object and reason: 为皇太子 (as the crown prince) and 帝甚病 (emperor became seriously ill)
Final English translation: In the first month of Jingchu's third year, Emperor Ming became seriously ill, and King Qi was appointed as the crown prince.
assistant