technical and economical benefit的用法和樣例：
例句
- Effort has been made on two main continuous ore-drawing and haulage systems and prominent technical and economic benefit have been achieved in China during the past ten years.
我國經(jīng)過(guò)近十年的努力，研究試驗了兩種采場(chǎng)連續出礦運礦的技術(shù)路線(xiàn)，并取得了顯著(zhù)的技術(shù)經(jīng)濟效果。
