diff --git a/ContentGrabbingJi-CacheStore-api/src/main/java/net/lamgc/cgj/bot/cache/SetCacheStore.java b/ContentGrabbingJi-CacheStore-api/src/main/java/net/lamgc/cgj/bot/cache/SetCacheStore.java
index 6231a2a..1f10cbe 100644
--- a/ContentGrabbingJi-CacheStore-api/src/main/java/net/lamgc/cgj/bot/cache/SetCacheStore.java
+++ b/ContentGrabbingJi-CacheStore-api/src/main/java/net/lamgc/cgj/bot/cache/SetCacheStore.java
@@ -21,6 +21,7 @@ import java.util.Set;
 
 /**
  * 无序集合的缓存存储容器.
+ * <p>其中, 元素是唯一的, 不会出现重复情况.
  * @param <E> 值类型.
  * @author LamGC
  */