但是仅仅因为它是困难的，我们不能放弃将其致命的火焰扑灭。
But just because it's difficult, we can not give up the will to extinguish its lethal flame.
然而，其他人认为，互联网是一个虚拟的世界，没有真爱存在，因为它是困难的对我们之间区分真和假。
However, others think that the Internet is a virtual world, there is no true love exist, because it is difficult for us to distinguish between true and false.
这主要是因为它是一种大分子物质，要穿过保护大脑免受血液中可能有害化合物入侵的血脑屏障很困难。
This is mainly because it is a large molecule, and has difficulty passing through the blood-brain barrier which protects the brain from potentially harmful compounds in the blood.
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