slate

中文： 板岩

1. A piece of such stone, usually cut into a rectangular shape, used as a tile for flooring, roofing, etc.; (uncountable) such tiles collectively, or the material from which they are made. (countable, uncountable)
2. A piece of other material used as a roofing tile. (countable, uncountable)
3. A generally rectangular piece, originally of certain types of stone and now of other materials, often in a frame, used for writing on with a thin rod of the same or another stone (a slate pencil) or with chalk; a small chalkboard. (countable, uncountable)
4. Synonym of tablet computer (“a hand-held portable computer in the form of a tablet with a touch screen interface”). (countable, uncountable)
5. A sequentially numbered session of recording a film. (countable, uncountable)
6. Information about a film recording which is inserted at the start of the recording, or printed on a videotape label etc. (countable, uncountable)
7. A record, for example, of money owed. (countable, figuratively, uncountable) · Put it on my slate—I’ll pay you next week.
8. A range of things; also, a schedule. (US, countable, figuratively, uncountable)

复数 slates