cháng shí
stone beam
horizontal slab of stone
feldspar or felspar (geology)
xié cháng shí
plagioclase (rock-forming mineral, type of feldspar)
zhēng cháng shí
orthoclase KAlSǐO8 (rock-forming mineral, type of feldspar)
zhèng cháng shí
orthoclase KAlSi3O8 (rock-forming mineral, type of feldspar)