Precarburization
预先碳化[渗碳]
🗣️ 情景例句
Morning, Grandpa.
早安， 爷爷。
She feels shy about meeting Frank for the first time.
她对于第一次和弗兰克约会感到难为情。
The little baskets were empty and the ground was covered with pieces of paper, cigarette ends, old tyres, empty bottles and rusty tins.
废物筐是空的，而满地都是纸片、烟头、旧轮胎，空瓶子和生锈的空罐头盒。