神秘莫测[shén mì mò cè]
词典be veiled in mystery:奥秘莫测;神秘莫测。
词典be enveloped in mystery:神秘莫测。
词典be rapt [shrouded
词典\u0039\u0031\u0031\u67E5\u8BE2\u00B7\u82F1\u8BED\u5355\u8BCD
词典wrapped] in mystery
神秘莫测[shén mì mò cè]
be veiled in mystery; be enveloped in mystery; be rapt [shrouded; wrapped] in mystery; mysterious and hard to guess; so subtle [mysterious] as to be difficult [hard] to guess what comes next