他十七岁时移居美国，二十岁生日时就入籍了。
He emigrated to the United States when he was seventeen years old, and was naturalized on his twentieth birthday.
他低头看了看十七岁生日得到的那块变了形的金表。
He looked down at the battered gold watch he had received on his seventeenth birthday.
他低头看了看十七岁生日得到的那块变了形的金表。
He looked down at the battered gold watch he had received on his seventeenth birthday.
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