Turn that radio down ...(Para. 4)
Meaning: Reduce the sound of the radio ...
turn down: reduce (a flame, a sound, etc.) usually by moving a switch
Please turn the television down. I'm trying to sleep.
請把電視機關小點聲,我想睡覺了。
n. 開關,轉換,鞭子
v. 轉換,改變,交換