Firearmor
镍铬铁锰合金
🗣️ 情景例句
I'm afraid the cardboard boxes are not strong enough for transport by sea.
我担心这种纸箱，用于远洋运输，不够结实。
Send a postcard to me when you arrive in Shanghai.
你到上海以后给我发张明信片。
That was a pleasant surprise.
这是意想不能的好事。