五岁以下的儿童乘火车通常免费。
新车主顾通常免费试用Sirius XM电台长达一年，之后仅有大约半数仍决定续订。
New-car buyers usually get a free trial of Sirius XM’s stations for up to a year, after which only about half decide to keep subscribing.
新节目生成后，播客会帮助你收集，你可以随身携带，并随时观看收听，通常免费。
When a new show is created, podcasting gives you a way to capture it and take it with you to watch or listen to later-usually for free.
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