Existing in imagination only; visionary; impractical.

想像的；幻想的；不实在的。

Conforming to a standard of perfection; perfect.

合标准的；完美的。

Expressing or embodying the perfect example or type.

理想的。

A standard, formed in the mind, of the highest excellence; an aim.

理想。

A perfect type; something that comes up to, and expresses in a concrete form, one's ideas of the highest possible excellence.

理想的东西；模范；典型。