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A hard lesson certainly, but also a shocking wake up call.
它的确是一个沉重的教训，但也是一次令人难忘的警钟。
youdao
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It is a hard lesson to learn, but we must all learn it.
学习这一课并不容易，但却是我们所有人的必修课。
youdao
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It is a hard lesson to learn, but we must all learn it.
学习这一课并不容易，但却是我们所有人的必修课。
youdao