这些小符号不容易被注意到，但它们很重要。
These little symbols are not easy to be noticed, but are really important.
他说，这种尺度很小的材料工程很容易被忽略，但它们很重要。
He says such materials engineered on such a small level are easy to ignore, but they are very important.
自那些基本思想建立起来之后所做的工作都是很重要的，但它们还不是（和基本思想）一样的基本标准。
The work that has been done since the establishment of these basic ideas has been important work, but not of quite the same fundamental standard.
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