Calculus
例
Calculus is used to find the area under a curve.
微積分は、曲線下の面積を見つけるために使用されます。
02
結石, リチアシス
a hard lump produced by the concretion of mineral salts; found in hollow organs or ducts of the body
03
歯石
an incrustation that forms on the teeth and gums



























