形容詞 theoretical:

1. concerned primarily with theories or hypotheses rather than practical considerations
   同義詞：theoretic
2. concerned with theories rather than their practical applications

1. The old professor had presided over a seminar for theoretical physicists.
   老教授主持了一次理論物理學家的研討會。
2. Japanese-born physicist. He shared a1973 Nobel Prize for theoretical advances in the field of solid-state electronics.
   江崎，玲于奈生于1925日本裔物理學家，由于他在固態(tài)物質電子學理論上的進展獲得了1973年諾貝爾獎
3. It's a theoretical possibility, but I don't suppose it will happen.
   這是一種理論上的可能性，但我認為這種情況不會發(fā)生。
4. This book is too theoretical; I need a practical one.
   這本書理論性太強，我需要一本實用的。