To think carefully and thoroughly before making a decision.
反复深入地考虑。
《楚辞·渔父》何故深思高举，自令放为？”《史记·穰侯列传》愿君熟虑之。”
After deep reflection and thorough consideration, she finally made her decision.
Learn the next connected idiom: 深思熟虑 (shēn sī shú lǜ) → 屡见不鲜 (lǚ jiàn bù xiān)
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