cast shadow的用法和樣例：
例句
- The tree projects a shadow on the grass.
樹投影於草地上。 - Objects can both cast and receive stencil shadows, so self-shadowing is inbuilt.
物體既可以投射出陰影，也可以接受陰影，進而這種技術可以對自投影具有良好的支持。
辭彙搭配
- cast one's shadow before 發出預兆,有預兆,有...
- cast a shadow upon 使…黯淡,給…投下一...
- cast a shadow on 給 ... 投下陰影...
