航空公司在决定执行这些规定时没有事先通知任何人，这给旅客带来了很多麻烦。
When the airlines decided to enforce these rules without giving anyone a heads-up, it created a lot of problems for travellers.
实施商旅集中管理项目最主要的目标，是为了让企业可以控制成本，并通过可实施的旅游政策来执行与航空公司签订的协议。
The prime objectives of managed corporate travel programs have been to enable companies to control expenses and to fulfill agreements with airlines through enforceable travel policies.
其它企业差旅政策改变的形式包括：鼓励员工当日往返(13%)、选择提供优惠价格的酒店和航空公司预订(12%)以及强制执行每日津贴规定(10%)。
Other reported changes to company travel policies include encouraging day trips (13%), booking with hotels and airlines that provide preferred rates (12%), and enforcing per diem allowances (10%).
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