青少年参加志愿者项目的原因可能是他或她的朋友也参加了这个项目。
A teen might join in a volunteer project because his or her friends are doing it.
出于这个原因，如果学员想要选修，我们将在他们决定参加选修时安排学员交款，此项不包括在这个项目的成本费用里面。
For this reason, we do not include this in the program cost, if they want it we will arrange for them to pay when they decide to attend.
到海外旅游或者参加交换项目的原因有很多，但最重要的原因是你可以开阔眼界。
There are numerous reasons to travel or go on an exchange, but the most important one is: it will broaden your horizons.
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