As free and open as communication has become, these are very real limitations that must be respected.
随着交流的自由公开化，这些都成了必须遵守的规定。
Every business must make money, free is not a good strategy, it will pay the price will be very big.
每一笔生意必须挣钱，免费不是一个好策略，它付出的代价会非常大。
It starts with good clean base oil.? The base oil must have very low residue content or be free of residue.
这始于良好的清洁基础油。？的基础油必须有非常高残留内容或无残留。
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