Meaning of nèi:
内
inside; inner; internal
Qǐng bǎochí ānjìng, huìyì zhèngzài shì nèi jìnxíng.
请保持安静,会议正在室内进行。
Please stay quiet, the meeting is taking place inside the room.
Wǒmen zài nèi bù kāihuì.
我们在内部开会。
We are having a meeting inside.
Zhège xiàngmù jiāng zài yīgè yuè nèi wánchéng.
这个项目将在一个月内完成。
This project will be completed within a month.
within
Qǐng zài shí fēnzhōng nèi wánchéng zhèxiàng rènwù.
请在十分钟内完成这项任务。
Please complete this task within ten minutes.
interior
Zhè ge fángjiān de zhuāngshì hěn piàoliang, tèbié shì qiángbì de nèi bù.
这个房间的装饰很漂亮,特别是墙壁的内部。
The decoration of this room is beautiful, especially the interior of the walls.