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
The course I took was above me.
我上的这门课太难了。
It's not up to his usual standard.
这次没有达到他平时的水平。
He talks as if he were the head of the office.
他说话的口气像办公室主任似的。