如何使用 "pencil" 造句

1. This just causes the pencil to slide but not turn .
但这只能使铅笔倒下而不是转起来。
2. With practice , it can done mentally without paper and pencil in just a few seconds .
经过练习后,它就可以抛开纸笔用心算在数秒之内得出结论。
3. Show me a red pencil .
展示我的红色的铅笔.
4. Sharpen your pencil . Show me your eraser .
削你的铅笔.给我你的橡皮.
5. Marked with a fingernail or a pencil .
都用指甲或是铅笔做了标记。