Public relations activities raise awareness of the product, its principal features and benefits, as well as where to buy it.
公关活动提高产品知名度、产品主要特点和优点，以及可购买的地点。
2
There are problems with doing this in an equitable manner. But the benefits of reducing principal on under water mortgages will be felt by all in the economy.
问题是要以公平的方式来冲减，而且整个经济体的方方面面都会感受到冲减水下按揭贷款本金的好处。
3
"The principal's problem" refers to the huge measurement cost when facing multitask principal, and the principal's state of inertia which resulting in the damage of agent's benefits.