《元史·本纪·卷三十一》
十六日，到达探秃儿海之地。
壬申，次探秃儿海之地。
On the 16th, they reached the land of Tan'tuerhai.
<s>[INST] Highlight and translate the key terms in the Classical Chinese text: 壬申，次探秃儿海之地。, and explain their significance in the context of the passage. [/INST] Key terms and their translations: 壬申: the ninth day (of a month); 次: next; 探: explore; 秃儿海: Lake Daihai.
Final English translation: On the 16th, they reached the land of Tan'tuerhai.</s>
Highlight and translate the key terms in the Classical Chinese text: 壬申，次探秃儿海之地。, and explain their significance in the context of the passage.
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Key terms and their translations: 壬申: the ninth day (of a month); 次: next; 探: explore; 秃儿海: Lake Daihai.
Final English translation: On the 16th, they reached the land of Tan'tuerhai.
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