“作成穹形”可以翻译为 “form into a dome shape” 或者 “create a dome-like structure” 。
例如：
The metal sheet was carefully hammered and shaped to form into a dome shape.（金属板被仔细捶打和塑形，作成穹形。）
They worked to create a dome-like structure over the central area.（他们努力在中央区域作成穹形结构 。）