Nationalism is based on nation. When investigating the conception of nationalism, we must concern the conception of nation first.
民族主义的基础是民族，对民族主义概念的探讨首先要涉及民族的概念。
Moreover, the potential of carbon is very close to that of lithium, when overcharge, the metal lithium will separate out on the surface of carbon, which is the intrinsic safety we must concern.
而且碳的电极电位与锂的电位很接近，当电池过充电时，金属锂可能在碳电极表面析出，形成枝晶而引发安全性问题。
We must concern ourselves with state affairs.
我们必须关心国家大事。
We must concern ourselves with current affairs.
我们必须关心时事。
We must concern ourselves with current affairs.
我们必须关心时事。
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