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Cov kiv cua oscillating me me kev sim 4-7 xyoo cov tub ntxhais kawm science thiab technology tsim khoom hauv chav kawm tes ua cov khoom siv
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Cov Khoom Siv Tshiab Tshaj Plaws Ua Ke Ntoo Cov Khoom Siv Txawj Ntse Science Me Nyuam Ua Tes Ua Hluav Taws Xob Ua Los Ntawm Ntoo DIY Cov Khoom Ua Si Physics Kev Kawm
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Lub nkoj fais fab uas tswj tau chaw taws teeb - kev tsim khoom tshiab ntawm cov tub ntxhais kawm ntawv theem pib
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Kev Lom Zem Txog Kev Tshawb Fawb me me ntawm cov tub ntxhais kawm theem pib thiab theem nrab kev txav mus los ntawm kev kawm txog qia qauv tsav tsheb lub zog
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Qauv Qhia Txog Kab Mob Cog Qoob Loo Anatomical Microscopic Chloroplast Qauv Rau Tsev Kawm Ntawv Qhia Ntawv