Peb tsis tau txawm ze ntawm daim ntawv qhia txog tej zaum thiab hwj huam ntawm lasers. Thaum peb siv lawv rau ib lub hauv paus txhua hnub, tshwj xeeb hauv laser alignment, Peb txhawb lawv siv nyob rau hauv tej kev lag luam, Tshwj xeeb tshaj yog hais tias nws yog rau tus txiv neej cov kev pab cuam. Thaum koj xav txog lasers, Koj xav tias huab cua thiab? Yog hais tias tsis yog, perhaps you should… English… Nyeem ntxiv »
