语焉不详

not speak in detail

语的英语翻译：

language; proverb; sign; signal; speak; vocable; words

焉的英语翻译：

here; how; why

不的英语翻译：

nay; no; non-; nope; not; without
【医】 a-; non-; un-

详的英语翻译：

detailed; details; know clearly; thorough