日期: 2021 年 2 月 3 日

• The COVID-19 Virus Is Mutating. What Does That Mean for Vaccines? | Time
• The Sperm Kings Have a Problem: Too Much Demand – The New York Times
• To Create a Healthy Habit, Find an Accountability Buddy – The New York Times

閱讀全文〈American Airlines: Boeing 787-9〉