Achieving these goals is relatively easy in theory, yet quite difficult in practice.
实现这些目标从理论上说比较容易，但在实践上却相当困难。
This is much harder in practice than in theory.
这一条在实践中比在理论上难得多。
That sounds almost reasonable in theory, but what, in practice, does it mean?
这听起来在理论上还算合理，可是如何操作呢？
Therefore, there is no “the best” method in theory, but the “proper” method in practice.
所以说，没有理论意义上的“最好”的学习方法，只有现实经验中的“适合”的学习方法。
All are against it in theory, but in reality, most practice it to some degree.
尽管理论上大家反对撒谎，而实际上大多数人或多或少会这么做。
Simple in theory, effortful in practice, and the most valuable, meaningful commodity in the world.
理论很简单，实践起来却需要付出努力，但你所收获的成果，也是这个世界上最有价值、最有意义的。
While great in theory, ignoring the phone is not so great in practice.
尽管忽略来电在理论上挺好，但在现实中就不是那么好了。
Regarding as pure morals of form principle essential in theory, it is feasible in practice.
因为作为纯粹形式的道德原则在理论上是必要的，在实践上是可行的。
In theory, theory and practice are the same. In practice, they're not.
理论上来说，理论和实际是一样的。但实际上来说，他们则不是。
This is true in theory, but not in practice.
这在理论上是真的，但却不是事实。
In theory as well as in practice, the idea is unsound.
这个主意在理论上和实践上都站不住脚。
Your plan is good in theory, but does it work in practice?
你的计划在理论上是不错的，但实行起来能行吗？
Ecotourism study is a subject which has significance both in theory and in practice.
生态旅游研究是一个既有理论意义又有实践意义的重大课题。
It looks all right in theory, but it will not work in practice.
这从理论上看似乎是对的，但在实际中行不通。
Your plan is good in theory, but I doubt if it'll work in practice.
你的计划在理论上是不错的，但我看实行起来未必能行。
Its tasks both in theory and in practice are very heavy.
它的理论任务和实际任务都很繁重。
Our scheme is good both in theory and in practice.
我们的方案在理论上和实施上都是好的。
In theory and in practice, human beings can be cloned.
从理论上和实践上说，人是可以被克隆的。
In Japan, jury trials were once available in theory but little used in practice.
在日本，理论上陪审团审判一直是存在的，但是在实践中几乎未采用。
In practice as well as in theory, Thatcherism is in the process of being abandoned.
不仅在理论上，而且在实践中，撒切尔主义正在被摈弃之中。
This seems clear enough in theory, but how does it work in practice?
这种说法理论上足够明白，但实际操作中又如何呢？
The report of the unexpected event is weak both in theory and in practice.
突发事件报道无论在理论上还是实践上都较为薄弱。
You plan is good in theory, but does it work in practice?
你的计划在理论上是不错，但实行起来能行吗？
Ryan says: the wink is good in theory but difficult in practice.
瑞安说：眨眼理论上是好的，但在实践中很难。
Therefore in theory and in judicial practice process inevitable existence insufficiency and questions.
所以在理论和司法实践过程中不可避免的存在不足和问题。
The research of delay differential equation is very important in theory and in practice.
这篇文章的主要目的是研究时滞对种群生长的作用。
It is easy to say in theory, but difficult in practice.
理论上说容易，实际上困难。
It is easy to say in theory, but difficult in practice.
理论上说容易，实际上困难。
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