Dealloying
脱合金成分腐蚀
🗣️ 情景例句
The advanced class starts at ten o'clock.
高级健身课十点钟开始。
Goodbye. Hope to see you again next year.
再见。希望明年再见到你。
You've done very well and made lots of progress.
你功课学得很好，进步很大。