Compole
換向極; 極間極; 整流極
??? 情景例句
The Sydney Olympics attracted more than one million new travelers into Australia.
悉尼奧運會吸引了超過一百萬新的旅游者到澳大利亞。
This river is one third as long as that river.
這條河只有那條河的三分之一長。
Such an attempt only aggravates the strain of mental effort.
這種愿望只能加劇精神緊張。