Improve wording in the documentation

docs/api/en/core/BufferGeometry.html

@@ -146,8 +146,7 @@
 
 		<h3>[property:Boolean morphTargetsRelative]</h3>
 		<p>
-			Used to control the morph target behavior; when set to true, the morph target data is treated as relative changes to the base geometry,
-			instead of completely replacing the base geometry data.
+			Used to control the morph target behavior; when set to true, the morph target data is treated as relative offsets, rather than as absolute positions/normals.
 
 			Default is *false*.
 		</p>