Update README.md

README.md

@@ -146,11 +146,14 @@ https://github.com/fxsjy/jieba/raw/master/extra_dict/dict.txt.big
 默认情况下，jieba采用延迟加载，一旦有必要建立trie。这需要1-3秒一次而以，之后还没有重新初始化。如果你想手工初始jieba，您可以用：
 
     import jieba
-    jieba.initialize()
+    jieba.initialize() #手动初始化（可选）
 
-在这一步还可以指定要使用的词典（可选）:
+在0.28之前的版本是不能指定主词典的路径的，有了延迟加载机制后，你可以改变主词典的路径:
+
+    jieba.set_dictionary('data/dict.txt.big')
+
+例子： https://github.com/fxsjy/jieba/blob/master/test/test_change_dictpath.py
 
-    jieba.initialize('data/dict.txt.big')
 
 分词速度
 =========
@@ -276,11 +279,11 @@ Initialization
 By default, Jieba employs lazy loading to only build the trie once it is necessary. This takes 1-3 seconds once, after which it is not initialized again. If you want to initialize Jieba manually, you can call:
 
     import jieba
-    jieba.initialize()
+    jieba.initialize() #(optional)
 
-You can also specify the dictionary to use in this step (optional):
+You can also specify the dictionary (not supported before version 0.28) :
 
-    jieba.initialize('data/dict.txt.big')
+    jieba.set_dictionary('data/dict.txt.big')
 
 Segmentation speed
 =========