I think he made a tactical blunder by announcing it so far ahead of time.
我认为他如此提早宣布消息是犯了战术上的错误。
Tom reached school ahead of time.
汤姆提前到了学校。
Guess the answer ahead of time and strip all the decimal places off.
提前猜出答案，把小数点位数都去掉。
Set out ahead of time, and you are much less likely to miss the bus.
提前出发，你就能不太可能会错过巴士了。