“意义深长”常见的英文表达有 “profound in meaning” 或 “full of significance” 。
profound in meaning： “profound”意为“深刻的；深远的”，“in meaning”表示“在意义上”，整体强调意义深刻、有深度。例如：This ancient poem is profound in meaning, requiring careful contemplation.（这首古诗意义深长，需要仔细品味。 ）
full of significance： “full of”表示“充满”，“significance”意思是“重要性；意义”，该短语侧重于表达富有重要的、深远的含义。例如：The old man's words were full of significance, leaving a deep impression on everyone.（老人的话意义深长，给每个人都留下了深刻的印象。 ）