Impurity density
[电] 杂质密度
🧩 词语组成解析
🗣️ 情景例句
Then, in college, I became good at it.
然后， 在大学， 我变得很精于数学。
If you can be well without health you may be happy without virtue.
如果不健康而能强强壮壮，那么无美德也可快快乐乐。
She works very hard and is very helpful.
她工作非常努力，对同学们帮助很大。