under construction的用法和樣例：
例句
- A sixlane, gradeless superhighway is under construction.
一條無坡度的六線高速公路正在建築中。 - A rigid board made of layers of fiberboard or paper bonded to a gypsum plaster core,used instead of plaster or wood panels in construction to form walls.
石膏灰泥板，灰膠紙柏板由石膏灰泥作芯板結合幾層纖維板或紙漿板製成的硬板，在建築中用於代替灰泥或木板來建造牆壁。
