Euxanthon
優噸酮, 1, 7-二羥(基)夾氧雜蒽酮
??? 情景例句
I hope you will excuse me.
希望你能原諒我。
Please try to estimate the extent of the damage.
請估計一下受損害的程度吧。
They have to work hard to support their family.
他們必須努力工作來支持他們的家。