Nitrocementation
碳氮共渗
🗣️ 情景例句
Maybe you're right, but I still feel that blue is the way to go.
也许你说得对，但我仍觉得蓝色才是合适的。
How long will it take you to have it fixed?
你要多少天才能把它修理好？
I haven't heard from her for a long time.
我好久没有她的消息了。