Precalciferol
[化] 前钙化醇
🗣️ 情景例句
Yes, but I'm only an amateur.
是的，我仅仅是业余爱好。
Can I take my vacation, sir? I would like to see my mother in Miami.
头，我可以休假吗？我要去探望在迈阿密的母亲。
From those humble beginnings, we have seen the development of the user-friendly home computers and multimedia machines which are in common use today.
从那些简陋的初级阶段，我们看到了现在都已普及的、使用简便的家用电脑和多媒体的微机的发展。