thetaKK [ˋθetə] /ˈθeɪtə/发音名词1西塔、希腊字母 θIn this formula, theta represents the angle between the two lines.在这个公式里,θ 代表两条线之间的夹角。2θ波、西塔波多指脑波Theta appears in the brain during light sleep and deep relaxation.θ波会在浅眠和深度放松时出现在大脑中。用这个字练口说→