这个古老的房子用深灰色的板岩铺设了台阶。
The old house has steps paved with dark gray ___slate.
这场音乐会定在下个月举行。
The concert is ___slated for next month.
工人们正在用石板铺设庭院的地面。
Workers are laying ___slates on the courtyard floor.
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