The new H and N surface proteins mean most people do not have antibodies to the virus, allowing it to go pandemic.
新H 和N表面蛋白这意味着多数人对这病毒没有抗体，使其得以流行。
VMS is the standard naval electronic chart display and information system (ECDIS-N), which is being deployed across the Navy's fleet of surface ships and submarines.
VMS系统是标准的海军电子海图显示和信息系统(ECDIS - N)，正部署在整个海军的水面舰艇和潜艇舰队。
So, remember, when we set up the divergence theorem, we need the normal vectors to point out of our region, which means that on the top surface, n But, on the bottom face, we want n pointing down.
当我们建立散度定理时，我们要使法向量指向区域外，即在上表面时，要指向上方。，we，want，n，pointing，up。,但是，在下表面，要使n指向下面。
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