发布网友 发布时间:2022-04-28 23:34
共4个回答
热心网友 时间:2022-06-25 11:34
Hard black(pencil lead)
硬黑:Hard black。硬--是HARD,所以缩写为H。黑--是BLACK,所以缩写为B。HB是软硬,黑度适中的。H前的数字越大--硬度越强--颜色越浅。B前的数字越大--黑度越强--也就越软。
例句:
1. Aunt Liti had a nut-brown face, hard black eyes and a hook of a nose.
2. The hard, black eel curves at the top, a perfect cane.
3. Ebony is a hard black wood.
4. Germans had hard black bread and, if lucky, sausage and butter.
5. The stone was cuboid Xiewo on the ground, tilted slightly westward , with iron and hard black stone surface smooth.
铅笔芯:pencil lead。
pencil
英 [ˈpensl] 美 [ˈpɛnsəl]
n.
铅笔,彩色铅笔;笔状物;画风,画法;[物]光线锥
vt.
用铅笔写;用画笔画
lead
英 [li:d] 美 [li:d]
vt.
领导;引导;指挥
vi.
导致;领导;用水砣测深
n.
铅;领导;榜样;*弹
adj.
领头的;最重要的;领先的
例句:
1、A discovery made from pencil lead is promising to change the future of the electronics instry.
2、Ordinary so-called pencil lead is graphite, a three-dimensional form of carbon.
3、Proct: movable pencil lead Type: PCRed yellow blue white four colours, bulk supply.
4、Which of the following pencil lead is the hardest?
5、The location analysis results of the pencil lead breaking test on thermal barrier coating showed the accuracy of this method.
热心网友 时间:2022-06-25 11:35
铅笔芯 pencil lead热心网友 时间:2022-06-25 11:35
HB (hard black)热心网友 时间:2022-06-25 11:36
HB