Stepped sprue
[机] 分级进模口
🧩 词语组成解析
v. 踏；行走（step的过去式和过去分词）
n. 浇口, 熔渣, 口炎性腹泻\\n[化] 浇口; 铸口; 流道
🗣️ 情景例句
I can't wait.
我迫不及待。
There is no friend so faithful as a good book.
最忠实的朋友莫过于一本好书。
Is that all? He doesn't say very much,does he?
就这些吗？他没写许多，是吗？