My initial reaction was to decline the offer.

我最初的反应是要婉言谢绝这个提议。

《牛津词典》

Fears are now being voiced that the planned construction of an oil pipeline across the lake's bottom might revive pollution and cause the fish population to decline again.

现在有人担心，计划修建的穿越湖底的输油管道可能会重新造成污染，导致鱼类数量再次下降。

youdao

To decline to vote is a cop-out.

不投票是一种逃避。

《柯林斯英汉双解大词典》

"Certainly the good news is that the rate of deaths of children under five years of age continued to decline in two thousand eight.

VOA: special.2009.09.28

Well, there's this funny glitch here between three-month and one-year, but then it just continued to decline.

虽然在三月到一年期债券间有个小波折,但整体趋势是向下的

耶鲁公开课 - 金融市场课程节选

Or "Yes, actually I do mind" if you want to decline a permission.

或者当你拒绝一种请求时，你就会说“是的，实际上我会介意。”

Do you mind 课堂 - SpeakingMax英语口语达人

Or are they doomed to decline and die, eventually to be replaced by disruptive new upstarts?

FORBES: The Creative Economy: Can Industrial Giants Reinvent Themselves?

Petersburg, solar activity is waning, so the average yearly temperature will begin to decline as well.

FORBES: To The Horror Of Global Warming Alarmists, Global Cooling Is Here

"They have to come up with something bold" because "Symbian continues to decline, " the person said.

WSJ: Nokia CEO Considers Big Shake-Up