他是他们的儿子。
He is their son.
youdao
他是他们的亲生儿子。
He is their very son.
他吓坏了的前妻证实，威胁是真实的：他们十几岁的儿子被绑架。
His horrified ex-wife confirms that the threat is real: Their teenage son has been kidnapped.
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