Rackwork
齿条, 齿条加工, 齿条机构
🗣️ 情景例句
Good Gemma.
乖Gemma。
'Tis altogether vain to learn wisdom and yet live foolishly.
枉自学聪明，却做愚蠢事。
The six students put their closed hands in front of them.
6个学生将握紧的手放在前面。