sigma
sigma-additive σ sigma-field σ sigma-function σ sigmate sigmation sigmoid sign sign-language sign-painter sign-writer signable signal signal-book signal-box signal corps signal-fire signal-flag signal-gun signal-lamp signal-man signal-men signal-post signal-station signalement signaler Signaling and screening signalise signalize signaller |
sigma /'sigmə/
danh từ
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