An averagely fit person can master easy ski runs within a few days.

中等健康的人几天内就能驾驭初级的滑雪道。

《柯林斯英汉双解大词典》

Within a few days she had become seriously ill, suffering great pain and discomfort.

在几天时间里她已病得很重，经受了极大的痛苦和不适。

《柯林斯英汉双解大词典》

New­born chicks can then imitate their mum's call within a few days of entering the world.

刚孵化的小鸡可以在出生后几天内就学会模仿妈妈的叫声。

youdao

Within a few days of Kennedy's remarks, the IRS launched the Ideological Organizations Audit Project.

WSJ: James Bovard: A Brief History of IRS Political Targeting

Even the Canadian plant will begin to run out of components within a few days.

ECONOMIST: Flint sparks fly

Expect a notice from the IRS within a few days of receiving the funds.

FORBES: Tax Refund Too Good To Be True? Don't Spend It