Each child was given a turn at being class leader, which involved handing round the pencils in the mornings and the like . 孩子们轮流当班长。当班长的孩子每天上午负责分铅笔等。
The so-called "lead" in a pencil is not lead at all, but chiefly a different form of carbon called graphite . 铅笔中所谓的铅，并不是“铅”，而主要是一种不同形态的炭，称为石墨。
The basic optical requirement is a fine pencil or thin ribbon of highly collimated, monochromatic, polarized light . 基本的光学要求是要有一个高度准直的单色偏振光的细光束或薄光带。
Louis moore sat at his desk, turning the leaves of a book open before him, and marking passages with his pencil . 路易斯穆尔坐在书桌边，翻着摊开在他面前的一本书，手里拿着铅笔在书上做记号。
Not them damn pencil pushers in washington 而不是那些在华盛顿见鬼的办公室职员
Not them damn pencil pushers in washington 而不是那些在华盛顿见鬼的办公室职员
The pencil has been whittled away to a mere stump 铅笔已削的只剩下一个笔头了。
He couldn ' t find his pen , so he wrote in pencil 他找不到钢笔了，所以用铅笔写。
Straight line double pencil edgeproduction line 直线圆边双边磨边生产线sszym1515
Hygienic standard for lead content of pencil coating 铅笔涂漆层中含铅量卫生标准
