Leucoflavin
无色核黄素
🗣️ 情景例句
OK, Philip. This is your third cup of coffee.
好啦 Philip。这是你第三杯咖啡了。
I'm afraid you have the wrong number.
恐怕你打错号码了。
In the 1970s, computers were common enough, but only in big business, government departments, and large organizations.
在70年代，计算机已经相当普及了，但只用在大公司，政府部门和大的组织之中，