理论上

• theoretically
• in theory
• in the abstract
• academically

例句

1. 江崎，玲于奈生于1925日本裔物理学家，由于他在固态物质电子学理论上的进展获得了1973年诺贝尔奖
   Japanese-born physicist. He shared a1973 Nobel Prize for theoretical advances in the field of solid-state electronics.
2. 他的建议在理论上可以，但不能付诸实现。
   His proposition is good in theory but cannot be put into practice.
3. 理论上是如此。
   It is so in theory.
4. 这是一种理论上的可能性，但我认为这种情况不会发生。
   It's a theoretical possibility, but I don't suppose it will happen.