永远

forever; always; ever; eternally; perpetually; permanently; evermore; eternal; timeless; everlasting; undying; perpetual; immortal; ageless; for good; for keeps; in perpetuity; for all time; from everlasting to everlasting; eternity; perpetuity

唯一

only; one; sole; unique; single; alone; solitary; solely; all; only one; the only one; the sole; the unique