specific weight的用法和樣例：
例句
- Granted the weight and the specific gravity of a body, we can calculate its volume.
假設已知一個物體的重量和比重，我們就能算出它的體積。 - To do this, we weight the hourly wage for each grade by its proportion of the total labor required to produce the product.
為此，把每一等級的小時工資，以生產這種產品所消耗的該等級勞動量佔總勞動量的比重為權數，進引加權。
