Hemiacetal
n. [化]半縮醛
??? 情景例句
And coming home on Sunday?
星期日回來是嗎？
I haven't the least idea.
我一點兒也不知道。
Ice is only as safe as the water from which it is made,
冰塊只有當制造冰塊的水安全時才是保險的，