single-hearted

He knew the simple single - hearted fidelity of his child, and understood why she had come.

他十分了解他这个单纯朴实的孩子的孝心, 了解她是为什么来的.

辞典例句

Xiaoming was reading a book with single - hearted devotion.

小明正在专心致志地看书呢.

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