As a non native English Reader, I often feel looking up words manually in dictionary or websites are not fast enough. Fortunately,there are some better ways to do this and i'll share it for you guys!
The built-in "cmd +ctrl + d" shortcut
This handy built-in system wide OS X shortcut is very handy. Just press it and the dfinitions will pop right on your face. It seems to show all the languages in your normal Dictionary app.
来源：oschina
链接：https://my.oschina.net/u/3378766/blog/3161684