Rheostats
n. [電] 變阻器；[電] 可變電阻（rheostat的復數形式）
??? 情景例句
I really appreciate you coming over to help me with my math.
我真的很感謝你過來幫我補習數學。
What do you think?Is that right?
你認為什么?那是正確的？
Something must be done about it.
必須得想個辦法。