根据出发城市和日期，选择目的机场。
Select a destination airport based on departure city and date.
你和你的意图可以创建一个行程的基础上一个城市，只要选择一间酒店，并计划根据各地活动的住所。
You and your intended can create an itinerary based on one city, just choose a hotel, and plan activities based around your accommodations.
如何根据实际条件，选择经济实用的技术来保障甚至提高供水水质，已经成为中小规模城市供水系统共同面临的问题。
How to select economical and practical technology to ensure drinking water quality according to local condition has become an urgent problem to be solved in small - and medium-sized cities.
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