Kuwala kumakhala ndi zotsatira zosiyanasiyana pa thanzi laumunthu, maonekedwe a chilengedwe, kuzindikira kwamaganizo, kagayidwe kachakudya ndi chitetezo cha mthupi kudzera muzowoneka ndi zosawoneka bwino zamoyo, ndipo ndi luso lofunika kwambiri la thanzi la anthu lomwe limayang'ana kwambiri m'madera a malire a zomangamanga, Optics, moyo sc ...
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