如果事物的行为能够适用于这个理论，那已经足够了。
But if the behavior of things is explained by this theory that's good enough.
如果这是真的，而且一旦它被彻底地理解，这个新理论就可以有助于解答关于质量增长的困惑。
If true, and once fully understood, the new theory should help solve the growth puzzle.
如果这个计划从理论上讲，能够是正确，那么它就是非常靠不住的。
While the plan could, in theory, be correct, it is very unlikely that it will be.
如果你做完这个实验，你对这个理论认识得会更深刻。
If you have done the experiment, you will realize the theory.
如果你做完这个实验，你对这个理论认识得会更深刻。
If you have done the experiment, you will realize the theory.
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