update: readme

README.md

@@ -95,9 +95,8 @@ The default engine is Google Translate. Currently, we support:
 | Google Translate(API) | No | Use `translate.googleapis.com` |
 | CNKI | No | https://dict.cnki.net |
 | Youdao Translate | No | [100+?](https://ai.youdao.com/DOCSIRMA/html/%E8%87%AA%E7%84%B6%E8%AF%AD%E8%A8%80%E7%BF%BB%E8%AF%91/API%E6%96%87%E6%A1%A3/%E6%96%87%E6%9C%AC%E7%BF%BB%E8%AF%91%E6%9C%8D%E5%8A%A1/%E6%96%87%E6%9C%AC%E7%BF%BB%E8%AF%91%E6%9C%8D%E5%8A%A1-API%E6%96%87%E6%A1%A3.html) |
+| NiuTrans | Yes | [400+](https://niutrans.com/documents/contents/trans_text#accessMode) |
 | Youdao Zhiyun | Yes | [100+](https://ai.youdao.com/DOCSIRMA/html/%E8%87%AA%E7%84%B6%E8%AF%AD%E8%A8%80%E7%BF%BB%E8%AF%91/API%E6%96%87%E6%A1%A3/%E6%96%87%E6%9C%AC%E7%BF%BB%E8%AF%91%E6%9C%8D%E5%8A%A1/%E6%96%87%E6%9C%AC%E7%BF%BB%E8%AF%91%E6%9C%8D%E5%8A%A1-API%E6%96%87%E6%A1%A3.html) |
-| Niu Translate(Trial) | No | [100+](https://niutrans.com/documents/contents/trans_text#accessMode) **UNSTABLE** |
-| Niu Translate | Yes | [100+](https://niutrans.com/documents/contents/trans_text#accessMode) |
 | Microsoft Translate | Yes(free 2M) | [200+](https://docs.microsoft.com/en-us/azure/cognitive-services/translator/language-support) |
 | LingoCloud(Caiyun) Translate | Yes | [zh, en, ja, es, fr, ru](https://open.caiyunapp.com/LingoCloud_API_in_5_minutes) |
 | DeepL Translate | Yes(free 500k) | [100+](https://www.deepl.com/pro?cta=header-prices/#developer) |
@@ -132,7 +131,7 @@ The secret format is `MY_APPID#MY_SECRET#MY_VOCABID(optional)`.
 >
 > [Official Document](https://ai.youdao.com/DOCSIRMA/html/%E8%87%AA%E7%84%B6%E8%AF%AD%E8%A8%80%E7%BF%BB%E8%AF%91/API%E6%96%87%E6%A1%A3/%E6%96%87%E6%9C%AC%E7%BF%BB%E8%AF%91%E6%9C%8D%E5%8A%A1/%E6%96%87%E6%9C%AC%E7%BF%BB%E8%AF%91%E6%9C%8D%E5%8A%A1-API%E6%96%87%E6%A1%A3.html)
 
-**Niu Translate**  
+**NiuTrans**  
 Apply [here](https://niutrans.com/NiuTransAuthCenter/login).  
 The secret format is `MY_APIKEY#dictNo(optional)#memoryNo(optional)`.