在理论上

• His suggestion is good in theory , but not in practice
  他的建议在理论上可以,但不能付诸实现。
• His suggest is availble in theory , but not in practice
  他的建议在理论上可以,但不能付诸实现。
• His proposal is possible in theory but not in practice
  他的建议在理论上可以,但不能付诸实现。
• His propose is useful in theory instead in implementing
  他的建议在理论上可以,但不能付诸实现。
• But then , in theory american house prices never fall
  但当时美国的房价在理论上是不可能下跌的。
• His advice is good in theory , but can ' t put into practice
  他的建议在理论上可以,但不能付诸实现。
• His advice is good in the abstract , but it can ' t carry out
  他的建议在理论上可以,但不能付诸实现。
• His suggestion is reasonable in theory , but not in practice
  他的建议在理论上可以,但不能付诸实现。
• That ' s all right in theory , but in practice it may not work
  在理论上是可行的，但实际上未必可行。
• I think he just finds the idea of gay attractive theoretically
  我觉得他只是在理论上觉得同性恋吸引人