basic gravity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。
- Once the desired specific gravity is established, the same strength must be used henceforth.
所需的比重一經確定,以後就必須使用同一濃度的酸。
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