I think he made a tactical blunder by announcing it so far ahead of time.

　　我認為他如此提早宣布消息是犯了戰術上的錯誤。

　　Tom reached school ahead of time.

　　湯姆提前到了學校。

　　Guess the answer ahead of time and strip all the decimal places off.

　　提前猜出答案，把小數點位數都去掉。

　　Set out ahead of time, and you are much less likely to miss the bus.

　　提前出發，你就能不太可能會錯過巴士了。