Subnanogram
低于毫微克(数量级)
🗣️ 情景例句
Do you have this in other colors or sizes?
你有别的颜色或号码的吗？
Why are you so much taller than I?
你为什么个子比我高那么多？
one ought to have at least two or three hobbies, and they must all be real.
至少应有两三种爱好，而且都比较实际。