Grooved roll
[机] 环槽滚子
🧩 词语组成解析
a. 带纹道的；表面有沟槽的
roll
[rəul]
vt. 辗;使（眼球等）左右转动;（使）原地转圈;滚动;
vi. 左右摇晃;翻滚;开始移动，启动;
n. 名册;滚翻;
🗣️ 情景例句
Learning to express oneself well in an important part of education.
学会把意思表达清楚是受教育的一个重要方面。
He's absorbed in his book.
他全神贯注地读书。
I'm sorry, but I don't have any with me now.
真抱歉，我现在身上没带。