a year ago today的用法和样例：
- A year ago today I was escaping through the gunfire to the International Concession while they lay buried none knows where.
- A pound today buys much less than it did a year ago.
- Sam and his wife busted up a year ago.
- He and his wife busted up a year ago.
- Jim and his wife bust up a year ago.
- The harbour silted up a year ago.