千古不易

(1)continuing forever or indefinitely; "the ageless themes of love and revenge"; "eternal truths"; "life everlasting"; "hell's perpetual fires"; "the unending bliss of heaven"

(2)永遠に、または、無期限に続けるさま

(3)not changeable or subject to change; "a fixed and unchangeable part of the germ plasm"-Ashley Montagu; "the unchangeable seasons"; "one of the unchangeable facts of life"

(4)変化することがない、変化が起こらない

(1)a fixed and unchangeable part of the germ plasm-Ashley Montagu

(2)生殖細胞のアッシュリー・モンタギューの固定されて不変の部分

(3)the unchangeable seasons

(4)不変の季節

(5)one of the unchangeable facts of life

(6)人生における不変の現実のひとつ