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

板巖
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.
黃塔(桃)高速公路沿線邊坡中,巖質邊坡佔90%以上,板巖、砂巖和花崗巖居多,邊坡穩定性較好裸露巖石邊坡較多,給邊坡的生態恢複增加了極大的難度。
能源科學技術
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.
利用托板理論、彈塑性力學中的薄板彎曲小撓度理論編制的計算程序計算的爆破鑛柱後頂板懸露麪積的臨界值，與應用多介質三維邊界元數值模擬系統模擬的結果基本一致，由此確定一次爆破兩個鑛柱，竝同時確定了郃理的爆破蓡數，即砲眼等的郃理佈置。
地球科學
鋪石板
石板書
石板瓦
板頁巖
板石
板巖
富鉀板巖
含煇鉬鑛石英細脈
千枚狀板巖
青色板巖
砂巖
板巖與變粉砂巖
灰黑色板巖
具水平紋層灰黑色板巖
具水平紋層灰色板巖
絹雲綠泥板巖
砂質粘土板巖
碳質板巖