1.decided显然的，显而易见的；毫无疑问的；决定了的，坚定的；明确的，无疑的
既可用于指人，又可用于指事物，指人时通常作表语。
There's a decided drop in attendance. 出席人数明显减少。
I'm quite decided about it. 对于此事我的主意已定。
His height was a decided advantage in the job.
干这项工作，他的身高是明显优势。
Her ignorance of the area put her at a decided disadvantage.
她对该地区一无所知，这显然对她不利。
I am quite decided about the issue.
对于该问题，我主意已定。
She spoke in a decided voice.
她语气坚定。
There is a decided difference between the two brothers. 兄弟俩有明显不同。
He was quite decided in the matter and no one could stop him.
在这件事上，他异常坚决，谁也拦不住他。
They are quite decided about it.
他们对此事的`态度十分坚决。
Please give us a decided answer.请给我们一个确实的答复。
2.decisive决定性的；果断的，断然的。指人果断的；也可用于指事物，表示决定性的。
Her opinion is decisive on the matter. 在这个问题上她的意见是决定性的。
A decisive person acts quickly. 果断的人办事干净利落。
a decisive factor/victory/battle
决定性的因素 / 胜利 / 战役
After losing this decisive battle, the general was forced to concede.
输掉了这场决定性的战役后，那位将军不得不承认失败。
The might of the army could prove a decisive factor.
军事力量可能会成为决定性的因素。
She has played a decisive role in the peace negotiations.
她在和谈中起了关键作用。
The decisive goal arrived against the run of play.
这个决定性的得分逆转了场上的局势。
a decisive victory决定性的胜利
He gave way to a younger, more decisive leader.
他让位于更年轻、更有决断力的领导者。
He should give way to a younger, more decisive leader.
他应该让位于更年轻、更有决断力的领导者。
What most people want to see is determined, decisive action and firm leadership.
大多数人希望看到的是果决的行动和强有力的领导作风。
There is a decisive change in the whole policy.
整个方针发生了决定性的变化。
The government must take decisive action on gun control.
政府必须在枪支管制方面采取果断措施。
They have vowed a quick and decisive response.
他们立誓要给出一个快速果断的回应。
He was a man of decisive action and an adventurous disposition.
他是一个行动果断又爱冒险的人。
Voters perceive him as a decisive and resolute international leader.
投票者认为他是一位坚定果断的国际领导人。
The battle of Stalin grad is a decisive one in the Second World War.
斯大林格勒战役是第二次世界大战中富有决定性的战役。
General Patton was known for his decisive manner.
巴顿将军以果敢著称。
He has a decisive character.
他具有果断的性格。
注意：
这两个词也都可表示“明确的，明显的”，用于此义时可以换用，但 decided 更为正式。
Her answer was a decided/decisive yes.
她的回答是明确的同意。