within

副词 within:

1. on the inside
   同义词：inside

1. We did the work within the time they had allotted to us.
   我们在指定的时间内把工作做完了。
2. Several cars are available within this price range.
   在这个价格范围内，有好几种汽车可供选购。
3. This is a task well within your ability.
   这完全是你力所能及的工作。
4. I'll be coming within an hour.
   一小时之内我就会到。

with.in

adv.（副词）
In or into the inner part; inside.
在…之内：在或进入里面；在内部
Inside the mind, heart, or soul; inwardly.
在里面，在心中：在内心、灵魂或思想中；在里面地
prep.（介词）
In the inner part or parts of; inside:
在…里面，在…内部：
例句：
resentment seething within him.
复仇的情绪在他的内心翻腾

Inside the limits or extent of in time or distance:
在…范围以内：在时间或距离的限制或范围之内：
例句：
arrived within two days; stayed within earshot; within ten miles of home.
两天之内到达；呆在听力所及之地；在离家十英里之内

Inside the fixed limits of; not beyond:
不超过：在既定的限制之内；不超出：
例句：
lived within her income.
她量入为出

In the scope or sphere of:
在…范围内；在…领域里：
例句：
acted within the law; within the medical profession.
在法律允许范围内活动；在医学专业领域里

Inside a specified amount or degree:
在确定的范围或程度内：
例句：
The team had pulled to within five points of winning.
该队在赢五分就可获胜

n.（名词）
An inner position, place, or area:
内部：里面的位置、地点或地区：
例句：
treachery from within.
内部欺诈

来源：
Middle English withinne
中古英语 withinne
from Old English withinnan
源自 古英语 withinnan
with [with] * see with
with [和] *参见 with
innan [from within] from in [in] * see in
innan [从内部] 源自 in [在…里] *参见 in