细说

nǐ bù bì xì shuō

你不必细说。

No need to go into detail.

xì shuō běn mò

细说本末

recount the development from the beginning to the end

wǒ bù dǎ suàn zài zhè r xì shuō jì shù shang de lǐ yóu

我不打算在这儿细说技术上的理由。

I won't go into the technical reasons why here.