HSK 7-9
Tā yì jiǎng qǐ wǎngshì jiù pǎoyěmǎ, bàntiān huí búdào zhèngtí.
Once he starts talking about old times, his mind just runs wild and he can't get back to the point.
HSK 7-9
Xiě wénzhāng zuì jì pǎoyěmǎ, sīlù yào qīngxī.
In writing, nothing's worse than letting your thoughts ramble off; you need a clear line of reasoning.
