用实践来证明。
Theory must be demonstrated by practice.
理论必须通过实验验证。
The design has been verified by practice.
设计得到了实用验证。
Tested by practice, the model is reliable.
实例检验该模型是可信的。
Now, the new device is proved by practice.
目前，新装置已在实际应用中得到肯定。
And the only way they can get there is by practice.
要想达到他的境界唯一的办法就是实践。
I am a lawyer by creation, but not by practice.
你可以认为我是一名律师，但现实中我不是。
Good qualities can be acquired only by practice.
只有实践才能带来好的特质。
The evaluation method is reasonable by practice.
实例表明，该方法是合理的。
Nothing is so hard but that it becomes easy by practice.
无论怎样难的事都久练自易。
Prove. d by practice, it can meet the engineering demand.
实践表明，文中的计算方法可满足工程要求。
The method has been proved reliable by practice of many years.
多年实践检验，方法可靠。
It has been proved by practice that this new method is more...
经实际检验，证明该评估方法比传统方法更有效。
Only by practice will you be able to improve your spoken English.
只有通过实践，才能提高你的口语水平。
Examined by practice, the implementation mechanism is successful.
经实践检验·本实现模式是成功的。
True virtue and learning are got rather by practice than by reading.
美德与学问，与其说来自书本，不外说来自实践。
Every language must be learned by practice instead of language rules.
每种语言必须通过实践学习，而不应通过语言规则来学习。
This training method is practicable which has been tested by practice.
经实践检验，这一培养方式是切实可行的。
It is proved by practice that the new technology is effective and safe.
经实践证明效果较好，安全可靠。
Well, learn English well by practice, therefore need you never give up!
好了，学好英语靠的是重复练习，因而需求你绝不保持！
Civilized nature and human society can not be created solely by practice.
人化自然、人类社会不可能单凭实践创造产生。
We gain knowledge by reading, by reflection, by observation or by practice.
求知门径颇多，或阅读或思考或观察或实践。
We can gain knowledge by reading, by reflection, by observation or by practice.
我们可以通过阅读、思考、观察或者实践来获得知识。
We can gain knowledge by reading, by reflection, by observation, or by practice.
求知门径颇多，或阅读，或回忆，或观察，或实践。
We can gain knowledge, by reading, by reflection, by observation or by practice.
求知门径很多，或阅读，或回忆，或观察，或实践。
This system meets need of design by practice measurement and is applied to practice.
通过实际测量，此系统满足设计要求并在实际中得到应用。
Theory comes from practice, which will eventually guide practice, and be tested by practice.
理论源于实践，最终又必将指导实践，并由实践来检验。
The method is available by practice, it can improve gear grinding machine dividing precision.
经实践证明，本方案实用可靠，可有效提高该磨齿。
It has been proven by practice that the excavator operated satisfactorily after engine replacement.
实践证明，换装发动机后挖掘机的使用效果良好。
It has been proven by practice that the excavator operated satisfactorily after engine replacement.
实践证明，换装发动机后挖掘机的使用效果良好。
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