top US official的用法和样例：
例句
- A lot of excitement and hope preceded this current round of talks because, for the first time, a senior US official sat at the negotiating table.
由于美国高级官员首次出席在谈判桌上，各方在这次会谈之前都感到很兴奋，也抱有很大的希望。 - The Seals arrived on the scene by parachuting from their aircraft into the sea, and they were picked up by the Bainbridge, a senior US official said.
一位美国高级官员说，海豹突击队是从他们的飞机上空降到海里，再登上班布里奇的。
