docs: emphasize velocity-based drag scaling effect

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: hhhhkrx

docs/en/graphics/particle/renderer-limit-velocity-module.mdx

@@ -24,5 +24,5 @@ Note that this module requires WebGL2. On WebGL1, enabling it will be silently i
 | [dampen](/apis/core/#LimitVelocityOverLifetimeModule-dampen) | `number` value controlling how strongly excess velocity is damped, in the range `0 ~ 1` |
 | [drag](/apis/core/#LimitVelocityOverLifetimeModule-drag) | [ParticleCompositeCurve](/apis/core/#ParticleCompositeCurve) object representing the drag applied to particle velocity over lifetime |
 | [multiplyDragByParticleSize](/apis/core/#LimitVelocityOverLifetimeModule-multiplyDragByParticleSize) | `boolean` value indicating whether to scale `drag` by particle size |
-| [multiplyDragByParticleVelocity](/apis/core/#LimitVelocityOverLifetimeModule-multiplyDragByParticleVelocity) | `boolean` value indicating whether to scale `drag` by current particle velocity |
+| [multiplyDragByParticleVelocity](/apis/core/#LimitVelocityOverLifetimeModule-multiplyDragByParticleVelocity) | `boolean` value indicating whether to scale `drag` by current particle velocity. When enabled, high-speed particles experience significantly more drag than low-speed ones |
 | [space](/apis/core/#LimitVelocityOverLifetimeModule-space) | [`ParticleSimulationSpace`](/apis/core/#ParticleSimulationSpace) enum specifying the space used for limiting velocity; only effective when `separateAxes` is enabled. When `separateAxes` is disabled, the speed limit applies to the overall velocity magnitude, so switching `space` produces no visual difference; only when `separateAxes` is enabled does per-axis limiting make `space` switching visually noticeable |

docs/zh/graphics/particle/renderer-limit-velocity-module.mdx

@@ -24,5 +24,5 @@ label: Graphics/Particle
 | [dampen](/apis/core/#LimitVelocityOverLifetimeModule-dampen) | `number` 类型，超出速度上限后施加的阻尼强度，取值范围为 `0 ~ 1` |
 | [drag](/apis/core/#LimitVelocityOverLifetimeModule-drag) | [ParticleCompositeCurve](/apis/core/#ParticleCompositeCurve) 对象，表示生命周期内对粒子速度施加的拖拽系数 |
 | [multiplyDragByParticleSize](/apis/core/#LimitVelocityOverLifetimeModule-multiplyDragByParticleSize) | `boolean` 类型，是否按粒子尺寸放大 `drag` 的影响 |
-| [multiplyDragByParticleVelocity](/apis/core/#LimitVelocityOverLifetimeModule-multiplyDragByParticleVelocity) | `boolean` 类型，是否按粒子当前速度放大 `drag` 的影响 |
+| [multiplyDragByParticleVelocity](/apis/core/#LimitVelocityOverLifetimeModule-multiplyDragByParticleVelocity) | `boolean` 类型，是否按粒子当前速度放大 `drag` 的影响。开启后，高速粒子受到的阻力远大于低速粒子 |
 | [space](/apis/core/#LimitVelocityOverLifetimeModule-space) | [`ParticleSimulationSpace`](/apis/core/#ParticleSimulationSpace) 枚举，指定限速所使用的空间；仅在 `separateAxes` 开启时生效。当 `separateAxes` 关闭时，限速作用于整体速度大小，切换 `space` 不会有视觉上的差异；只有开启 `separateAxes` 后，各轴独立限速，`space` 的切换才会产生明显的视觉效果 |