qǐng / bú yào / zài / kè táng / shàng / qǔ nào / yǐ miǎn / yǐng xiǎng / qí tā / tóng xué / xué xí

请不要在课堂上取闹，以免影响其他同学学习。

Please do not fool around in class, or you may disturb your classmates' learning.