存在

exist; be; lie; live; obtain; survive; subsist; reside; find; bubble; occur; make; consist in; pertain; limit to; existence; being; survival; presence; occurrence; existent; present; -dom; there; existentially; in existence; as an existence

就是

exactly; precisely; just; indeed; yes

合理

reasonable; just; sound; valid; reasoned; rational; equitable; sensible; logical; justified; well-founded; fair; coherent; reasonably; well; rationally; naturally; reasonableness; justice; equity; rationality; moderation