Ergosterine
麦角固醇
🗣️ 情景例句
I called my parents from the airport.
我从机场打电话给我父母。
Improve your time and your time will improve you.
珍惜时间，时间才会珍惜你。
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。我们明天再多买些。现在我们应该把地板弄好。你能抓住木板的另一端吗？现在你要来回拉动木板，使它的表面象那块儿木板一样光滑。