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theta

/ˈθiːtə/ /ˈθeɪtə/

Illustration theta - Image 1

noun

西塔，θ，希腊字母θ。

The eighth letter of the Modern Greek alphabet, ninth in Old Greek: Θ, θ.

Examples :

""In Greek class, we learned that theta is the eighth letter of the alphabet." "

在希腊语课上，我们学到西塔（theta）是希腊字母表的第八个字母。

Illustration theta - Image 1

noun

Theta 角，角度。

The measure of an angle.

Examples :

"The math problem asks us to find theta, which is the angle of the triangle. "

这道数学题要求我们求 theta 角，也就是三角形的那个角度。

Illustration theta - Image 1

noun

Theta值，时间衰减

The sensitivity of the value of a derivative with respect to time; the "time decay".

Examples :

"The option's theta was significant; each day, its value decreased noticeably due to time decay. "

这个期权的 Theta 值很大，所以随着时间衰减，它每天的价值都在明显下降。

finance business math time

Illustration theta - Image 1

noun

西塔波，θ波

Designating a level of brain activity as measured by electroencephalography having a frequency of between four and seven cycles per second (associated with drowsiness in adults).

Examples :

"As the meditation session deepened, the brainwave monitor showed a shift from alpha to theta, indicating increased relaxation and a state close to sleep. "

随着冥想的深入，脑波监测仪显示脑电波从阿尔法波转换到了西塔波，表明放松程度加深，并接近睡眠状态。

physiology mind medicine frequency sensation

Illustration theta - Image 1

noun

Theta, 无声齿擦音，θ。

The voiceless dental fricative represented by θ.

Examples :

"In phonetics class, we practiced making the "th" sound in "thin," which is represented by the Greek letter theta. "

在语音学课上，我们练习发 "thin" 中 "th" 的音，这个音用希腊字母 theta（θ）表示，也就是无声齿擦音。

phonetics language linguistics word