The Wheat-stone bridge is a precision measuring instrument utilizing the principle of changes in（）.
The Wheat-stone bridge is a precision measuring instrument utilizing the principle of changes in（）.
Stone does not（）, and so the tools of long ago have remained when even the bones of the men who made them have disappeared without trace.
A structure，usually made of stone，or cement pilings，which extends from the bank at approximately right angles to the current is called a（）.
The fairy said, "You will be transformed into two statues of stone but still（）your reason."
The Wheat-stone bridge is a precision measuring instrument utilizing the principle of changes in（）.
A structure，usually made of stone，or cement pilings，which extends from the bank at approximately right angles to the current is called a（）.
The Wheat-stone bridge is a precision measuring instrument utilizing the principle of changes in（）.
蜂窝石（alveolar stone）
石柱（stone pillar）
