1. upcast volcanic ash.
   向上喷出的火山灰
2. Don't upcast or chuck the scaffolding materials and don't leave behind the material on scaffolding.
   不可以上抛及下扔脚手架材料，不许遗留脚手架材料在架子上；
3. "Go down oneself from cliff upcast, fall on the ground before, I learned to fly.
   “把自己从悬崖上抛下去，摔到地上前，我学会了飞翔。”

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