retral是什么意思_retral用英语怎么说_retral的翻译_retral翻译成_retral的中文意思_retral怎么读,retral的读音,retral的用法,retral的例句

Adjective

• 1. moving or directed or tending in a backward direction or contrary to a previous direction

• 2. at or near or toward the posterior