Copromanganese
铜锰合金
🗣️ 情景例句
Did she say why she had to leave today?
她说了她为什么今天非走不可吗？
Many great writers were not appreciated fully while they were alive.
许多伟大的作家当他们活着时没有被充分重视。
He will soon visit Darwin.
他不久还将到达达尔文去，