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Mu Feng was furious, turned his head and glared at Ning Mo, and said, "Ning Mo, you guy will take revenge, I just saved you, you save me." ”

Ning Mo said with a look of disgust: "Miss Ling is such a tall baby, you are said to be like a pig's nose, you said that you should not be beaten." “

Mu Feng thought about it, looked at Shui Lingyue very embarrassedly, and scratched his head apologetically.

Xiao Yichen also felt that the nose was very strange, and he groaned slightly, and said, "Yueyue, is there something precious in this long nose?" ”

Shui Lingyue's little white fingers pointed to the long nose of the gas mask, and nodded: "Yes, there is a filter device installed here, which can filter out toxic substances." ”

"Filtering?" Mu Feng was a little puzzled, and said, "Miss Ling, why is it filtered, just block your nose." ”

Ning Mo said angrily: "Then you reach out and pinch your nose to try." ”

Shui Lingyue glanced at the two of them and said, "Naturally, it can't be blocked directly, because we need to breathe air, and this filter device can filter and absorb toxic substances, and then let the air pass through normally." ”

"Air?" Mu Feng was slightly stunned, it was the first time he had heard of the word air, he was like a curious baby, chasing this question, and asked again: "Ling girl, what is air?" ”

Xiao Yichen had never heard of the word air, but listening to Shui Lingyue's words just now, it was obvious that air was something that people inhaled on a daily basis.

Everyone breathes every day, but Xiao Yichen has to admit that before today, he never thought that what he inhaled every day was something called air.

Shui Lingyue looked at the sky speechlessly, she felt that with Mu Feng's strong desire for knowledge, it was necessary for her to give them a junior high school chemistry popularization class.

Shui Lingyue said: "Air is what we inhale every moment. You can't see it, you can't feel it, but once you lose him, you can't live. ”

Mu Feng vaguely understood the meaning of Shui Lingyue's words, but he couldn't figure it out, he tilted his head and thought carefully, and subconsciously pinched his nose with his hand, and sure enough, he felt a burst of suffocation, but after a while, he felt a feeling of being out of breath.

Ning Mo on the side was also surprised, and said: "I didn't expect that our surroundings were filled with air, and I thought that there was nothing around us except people and things." “

Shui Lingyue smiled: "Of course, there are many things that you can't see or feel?" ”

"How much? What else? “

Hearing Ning Mo and Mu Feng ask at the same time, Shui Lingyue suddenly felt that she was just talkative, what a pit she had dug just now.

"This ...... cough ......" Shui Lingyue coughed lightly.

Xiao Yichen looked at Shui Lingyue's serious little appearance, and his heart was proud and proud for a while, this is his Yueyue, he is alone, unique Yueyue.

Xiao Yichen said in a deep voice: "Okay, I don't usually see you two so studious!" ”

Shui Lingyue glanced at Xiao Yichen gratefully, and said, "Yes, you two can't go up to Yunwu Mountain yet?" ”

Although Ning Mo and Mu Feng were very interested in the things that Shui Lingyue said that they couldn't see or feel, at this moment, it was naturally the master's matter that mattered, so the two of them didn't say anything else.

The four of them put on their masks and headed all the way up the cloudy mountain.

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