1. 以天文物理聞名的史蒂芬滅N金，其出版的「時間簡史(A Brief History of Time)」
是他最為人熟知的著作。
Stephen Hawking, who is well-known in astrophysics, published his most famous
work "A Brief History of Time".
2. 即使罹患罕見疾病，霍金仍靠著先進的醫療技術延續生命，並活到了76歲。
Though suffered from a rare disease, Hawking had still extended his live by ad
vanced medical technology and passed away until seventy-six years old.
以上翻譯若有需再修正，歡迎各位指教，謝謝！

關於第1句，我原本以為後面會接出版時間，其他讀者可能也會有這樣的疑惑，或是覺得語句就莫名斷掉了，但看中文是個完整的句子，不妨考慮把well-known留到講他的出版品