单词学习：nib 名词
nib
/nɪb/
1. (钢笔的)笔尖 2. (鸟的)喙尖 3. (工具等的)尖端
Mr. Gu carefully replaced the nib of his fountain pen before continuing to write.
顾老师小心地更换了钢笔的笔尖，然后继续书写。
单词卡片
卡片已就绪
