灰

huī ash; dust; lime; gray; discouraged; dejected

狼

láng wolf; CL:匹[pi3],隻|只[zhi1],條|条[tiao2]

免费

miǎn fèi free (of charge)

虚拟

xū nǐ to imagine; to make up; fictitious; theoretical; hypothetical; (computing) to emulate; virtual

主机

zhǔ jī main engine; (military) lead aircraft; (computing) host computer; main processor; server

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