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 generally go to bed at ten.
我通常十点钟睡觉。
And do you have friends there?
你在那儿有朋友吗？
The spheres had been magnetized and attracted or repelled each other all the time.
金属球经过磁化，互相之间不停地相互吸引或相互排斥。