Biotin complex of yeast
[機] 生物胞素
?? 詞語組成解析
n. 生物素\\n[化] 生物素; 維生素H
of
[?v]
prep. 關于;屬于…的;由…制成;
aux. 助動詞 [非標準用語、方言] =have [主用于虛擬語氣];
yeast
[jist]
n. 酵母（菌）;酵母粉，酵母餅，酵母片;泡，泡沫;動亂，激動;
vi. 發酵;起泡沫;
??? 情景例句
Is room service available?
有房間服務嗎？
Wealth is not his who has it, but his who enjoys it.
財富并不屬于擁有的人，而是屬于享用的人。
OK. We can get some more tomorrow. We should finish the floor now. Can you take the other end of this piece of wood? Now you have to pull it to make the surface smooth like that.
好吧。我們明天再多買些。現在我們應該把地板弄好。你能抓住木板的另一端嗎？現在你要來回拉動木板，使它的表面象那塊兒木板一樣光滑。