but构成的是并列句，though构成的是复合句，但这不是问题的关键，关键是：but强调的是but后面半句的含义，though强调的是though前半句的含义。
如：
- He can afford a car, though he is really poor. 尽管他真的很穷，但是他还是能买得起一辆车。（强调“能买得起车”）
- He can afford a car, but he is really poor. 他能买得起一辆车，但是他真的很穷。（强调“他真的穷”）
试一下：
Everyone is facing issues during the pandemic, _____ some competitors have been lucky. Weightlifter Kate Nye trains at home in her garage. She said, “When everything kind of started shutting down, it obviously affected our lives in other ways–but weightlifting wasn’t one of them. I’ve just been going as planned.”
答案：but，因为Weightlifter Kate Nye属于“lucky”者。
