1 sentence

1. 他的理论往往陷入了形而上学的讨论中。

   tā de lǐ​lùn wǎng​wǎng xiàn​rù le xíng'ér​shàng​xué de tǎo​lùn zhōng.

   His theories often get bogged down in metaphysical discussions.

   Source: Dong Chinese Dictionary