grinding 是 ground 的现在分词，也是 grind 的现在分词

ground

KK [graʊnd] /ɡɹaʊnd/

名词

1
地面、地上
He slipped on the ice and fell hard to the ground.
他在冰上滑倒，重重摔在地上。
2
土地、土壤
The ground here is too dry to grow vegetables.
这里的土地太干，种不出蔬菜。
3
场地、用地
The new sports ground opens to the public next month.
新的运动场地下个月对外开放。
4
理由、根据常用复数
She had good grounds for refusing to sign the contract.
她有充分的理由拒绝签这份合约。
5
领域、范围
The lecture covered a lot of ground in two hours.
这场讲座在两小时内涵盖了很多内容。
6
阵地、立场
Our party is slowly gaining ground in rural areas.
我们党在乡村地区正逐渐取得优势。
7
地线、接地电学
Make sure the wire is connected to a proper ground.
要确保这条电线接到适当的地线。
8
渣、沉淀物常用复数
Don't pour the coffee grounds down the kitchen sink.
别把咖啡渣倒进厨房的水槽里。

1
禁足、罚不准出门口语
My parents grounded me for a week after the party.
派对过后，父母罚我一个星期不准出门。
2
使停飞常用被动
All flights were grounded because of the heavy snow.
由于大雪，所有航班都停飞了。
3
以⋯⋯为基础、根据常用被动
Her argument is grounded in years of careful research.
她的论点建立在多年的细心研究之上。
4
使搁浅、搁浅
The cargo ship grounded on a sandbank near the harbor.
那艘货船在港口附近的沙洲上搁浅了。
5
接地电学
Every metal appliance in the kitchen must be properly grounded.
厨房里每件金属电器都必须妥善接地。