To endure hardship first and then enjoy happiness or success; to experience bitterness before tasting sweetness.
他从小就刻苦学习，知道先苦后甜的道理，所以现在才能取得这么好的成就。
He studied diligently from a young age, knowing the principle of enduring hardship first for later reward, which is why he can achieve such great success now.
Era:
Modern
Frequency:
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