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