slate

(ROCK) a dark grey rock that can be easily divided into thin pieces, or a small, thin piece of this used to cover a roof
(FOR WRITING) in the past, a small, thin, rectangular piece of slate (= rock), usually in a wooden frame, used for writing on, especially by children
(COMPUTER) a small computer with a screen that you can write on using a special pen
(LIST) a list of people who are being considered for a particular job or position, especially in politics
(CHOOSE) to be expected to happen in the future or to be expected to be or do something in the future
(CRITICIZE) to attack by criticizing; to write or say that something is very bad
(ROCK) to cover a roof with slates
of a colour similar to slate

Slate is a dark grey rock that can be easily split into thin layers. Slate is often used for covering roofs.
A slate is one of the small flat pieces of slate that are used for covering roofs.
If something is slated to happen, it is planned to happen at a particular time or on a particular occasion.
to cover (a roof) with slates
to criticize harshly censure
of the colour slate
If you start with a clean slate, you do not take account of previous mistakes or failures and make a fresh start.

专业释义

板岩
The rock slope is more than 90%in the slope of HuangTa(Tao)highway,stability better and bare rock slopes are mass. A majority lithology of slope is slate,sandstone and granite.
黄塔(桃)高速公路沿线边坡中,岩质边坡占90%以上,板岩、砂岩和花岗岩居多,边坡稳定性较好裸露岩石边坡较多,给边坡的生态恢复增加了极大的难度。
能源科学技术
托板
The result of slate theory and elastic-plastic mechanics theory analysis and computer stimulation of multi-medium three dimension boundary element is alike. So two pillars is blasted once at a time, and reasonable blasting parameter is determined.
利用托板理论、弹塑性力学中的薄板弯曲小挠度理论编制的计算程序计算的爆破矿柱后顶板悬露面积的临界值，与应用多介质三维边界元数值模拟系统模拟的结果基本一致，由此确定一次爆破两个矿柱，并同时确定了合理的爆破参数，即炮眼等的合理布置。
地球科学
铺石板
石板书
石板瓦
板页岩
板石
板岩
富钾板岩
含辉钼矿石英细脉
千枚状板岩
青色板岩
砂岩
板岩与变粉砂岩
灰黑色板岩
具水平纹层灰黑色板岩
具水平纹层灰色板岩
绢云绿泥板岩
砂质粘土板岩
碳质板岩