zài / wù lǐ / kè shàng / lǎo shī / yòng / kè xī / biǎo shì / diàn zǔ / de / cè liáng zhí

在物理课上，老师用克西表示电阻的测量值。

In physics class, the teacher used xi (Ξ) to represent the measured value of resistance.