You can breathe fresh air, and make some friends when travelling.
这样既可以领略大自然的美丽风光、呼吸新鲜空气，还可以交友；
Please don't worry about it. Tests have proved that you can breathe fresh air day and night without its doing any harm to the body.
请不要为此担心。试验业已证明，你尽可日夜呼吸新鲜空气，而不会对身体造成任何伤害。
When you walk in the street, you can feel the gentle wind touching your face and breathe the fresh air.
当你走在街道上，你能感觉温和的风触摸着你的脸，并且呼吸到新鲜的空气。
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