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
Please do the work at your own convenience.
请在方便时把这事做一做。
We can't draw well.
我们不能画那么多。
Most of Debbie's school friends will be waiting for her on the English coast.
黛比的大部分同学将在英国海岸等候她。