I am here, recommending two online dictionaries which i feel very helpful and convenience to use.
They are,
1, http://dict.bing.com.cn
2, http://dict.cn/
You can access them on your desktop , laptop and even on your mobile phone on which the Internet connection is avaliable.
Those websites not only provide the translation from English to Chinese,Chinese to English, but also give us  plenty of related information that help our learning.
Now trying to use them today, if you are still looking for online dictionary and need some help from English learning Tool.
Although you can share other resources of English Learning Tools with us on this website.
Thank you in advance!