回复：回复：回复：回复：*=*=* 《每日一句汉译英》 *=*=*

I thought of cooperation, my understanding on these two words are:

cooperation, is one party take the lead,the other parties get involvement to fulfil a support role.

collaborate, requires more legal process in defining responsiblity and liability, each party have their final say on their designated tasks,they are independent but work together to achieve a common goal.