work an abacus造句
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abacus造句
useanabacus;workanabacusIcanuseabacusskillfully.Learnhowtouseanabacus.Theyalsolearnedtousetheabacus.InEnglishwecallitanabacus.ButIaminterestedinusinganabacus.Effectsofmentalabacuscalculationoncognitiv...
on the abacus造句
Sheknewhowtoworkontheabacus.Asthestudentslearntomanipulatethebeadsontheabacus,theylearntoaddandsubtract.Startingthisyear,therewillbeaseparateadvancedclassforthestudentswhowishtocontinueandperformharde...