zh doc: update the Interpolations.html

docs/api/zh/extras/core/Interpolations.html

@@ -11,7 +11,7 @@
 		<h1>插值（[name]）</h1>
 
 		<p class="desc">
-			[name] contains spline and Bézier functions internally used by concrete curve classes.
+			[name] 包含了由具体的曲线类在内部使用的样条曲线和贝塞尔曲线函数。
 		</p>
 
 		<h2>方法</h2>