Yes, it serves a useful function but is it the main way of shopping for travel?

的确，这是一项实用的功能，但这是旅游购买的主要方式吗？

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The baggage required for the trip is a function of the starting point, mode of travel, expected duration of the journey, and of various conditions and expected activities at the destination.

旅程所需的行李随着起始点、旅行的模式、预期的旅行时间，和目的地的各种条件和预期的活动而变化的。

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Walking shoes. Black slip-on Merrells that function primarily as my travel and sightseeing shoes (or anytime I plan on walking more than a mile or so).

黑色懒人迈乐鞋是我旅游观光的首选鞋（或者在任何我计划走超过一英里以上的时候）。

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While most people support the principles of environmental protection, few would want to go back to the 18th century, living without electricity, central heating, air travel and automobiles, all of which rely primarily on hydrocarbons to function.

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Since the particulates travel great distances before they are washed out, even this small dose is not a function of distance from the power plant, but is randomized geographically.

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