But it's depressing that all too often this natural enthusiasm of the young has been stifled by the time they leave school.
但令人沮丧的是这些与生俱来的热情往往在年轻人离开学校的时候就被遏制了。
The village no longer existed because it had been submerged , and all the valley too. The lake was not a natural one, but a man-made reservoir .
村庄已经不再了，它已经淹在水中了，整个山谷都已经淹入水中了。湖不是天然的，而是人工造的蓄水池。
Many people eat too many of these unhealthy snacks. But others opt for more healthy eating habits. Some even go "all natural." They refuse to eat any food prepared with chemicals or additives.
许多人吃了太多这种不健康的零嘴，但是其它人则选择较健康的饮食习气，有些人甚至选择“全天然”的食物，他们拒绝吃任何有化学制品或添加物的食物。
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