preliminary announcement的用法和样例：
例句
用作名词 (n.)
- Is this announcement the signal of better times ahead?
宣布的这件事是否预示往後日子越过越好了？ - The initial announcement of the decision to dispatch two senior envoys to Damascus came from Secretary of State Hillary Clinton during a visit to Jerusalem.
美国将派遣两名高级官员在未来几天内前往叙利亚，这可能预示奥巴马政府中东外交努力的新方向。
