界限

这项工程必须在规定的界限内顺利完成。

zhè xiàng gōng chéng bì xū zài guī dìng de jiè xiàn nèi shùn lì wán chéng.

This project must be completed smoothly within the prescribed limits.

做人做事都要有明确的道德底线，公与私的界限必须分明。

zuò rén zuò shì dōu yào yǒu míng què de dào dé dǐ xiàn, gōng yǔ sī de jiè xiàn bì xū fēn míng.

We must have a clear moral bottom line in everything we do and do, and the boundaries between public and private must be clear.