Panacelan
三羥基前列腺二烯酸
??? 情景例句
I have a heavy class load this term.
這個學期我的功課很重。
How much is it?
這賣多少錢？
Half a pound of coffee.A quarter of pound of tea.And a tin of tobacco.
半磅咖啡、1/4 磅茶葉和一聽煙絲。