1. 理论上：原来是我叔家要卖牛,我爷爷非让卖给我姑家,我姑家不要,我爷爷就让卖给我家,我家也不要,我爷爷就发火(to hit the ceiling)了,说那牛好,反正不让卖给别人家,理论上(in theory)讲是肥水不流外人田(to take advantage of this favor

2. 理论上地/副词词组：5. Be capable of sth./doing sth. 某人能够胜任某职位;某事有可能做某事/形容词词组 | 6. In theory 理论上地/副词词组 | 7. Have access to sth./doing sth. 接触,使用,可接近/动词词组

3. 从理论上看：in short--总之 | in theory--从理论上看 | in trouble--有麻烦

4. 从理论上说：in the long run从长远来看 | in theory从理论上说 | in turn依次,轮流

adv

1. with regard to fundamentals although not concerning details

    e.g. in principle, we agree

    Synonym: in principlein essence