@沁兰,

You might want to try our own Chinese-English dictionary, which currently has around 210,000 entries. Missing entries can be easily added:

http://popupchinese.com/dictionary

It's also possible to use any (lesson) comment box as an IME. Look for the green "en" (english) button and click on it to switch into red "cn" (chinese) mode. Start typing in pinyin and pick whichever character you wish.

Best,

--david