then you understood的意思|示意

If you understood the subject when you were learning it, then the specific accuracy of a metaphor won't be as important as the connection itself.

如果你已经明白你所学习的科目，那么知识与知识间连结的精度就不比知识连结本身重要。

Also deep deeply comprehends to this speech's real meaning "if you had understood mathematics, you have then understood the computer graph study".

也深深领悟到“假如你懂得了数学，你便懂得了计算机的图形学”这句话的真实含义。

But she said something different to me…You can't have understood that right. " Did you then dismiss the idea that what your friends heard could have actually been true?"

可是她对我说的不一样…你一定是没理解对” 随后你将你的朋友们听到的可能其实是真的这个想法打消？

then you probably haven't completely understood the seriousness of the situation.

你可能还没有完全理解事情的严重性。

Then you can always ask for repetition or clarification if you have not understood, whereas a native speaker would be less likely to do so without losing face.

其次，不理解时你可不断要求重复或解释，而说母语的人这样做则会很丢面子。

The recommendation should be understood as meaning that if you implement ALL these recommendations, then you'll get the performance benefit shown.

对于建议应该这样来理解，如果您实施所有建议，那么可以获得显示的性能好处。