之内

sì hǎi zhī nèi jiē péng you

四海之内皆朋友！

All within the world are friends!

nǐ huì zài yī zhōu zhī nèi shōu dào dá fù

你会在一周之内收到答复。

You should receive a reply within a week.

nà ge wèn tí bù zài běn cì huì tán fàn wéi zhī nèi

那个问题不在本次会谈范围之内。

That question is not within the scope of this talk.

jì huà zhī nèi

计划之内

part of the plan

kě néng de fàn wéi zhī nèi

可能的范围之内

within the bounds of possibility

sān xiǎo shí zhī nèi

三小时之内

within three hours

shí fēn zhōng zhī nèi

十分钟之内

within ten minutes

wǔ tiān zhī nèi

五天之内

in five days