tin tức
After filling an empty water bottle with stones, a professor took out a box of pebbles and poured them into the water bottle. He gently
2019年8月1日
Tập trung vào bình nước chất lượng cao trong 15 năm
Thực đơn
Tập trung vào bình nước chất lượng cao trong 15 năm
After filling an empty water bottle with stones, a professor took out a box of pebbles and poured them into the water bottle. He gently
A professor picked up a cup with water and asked the audience, "Guess how heavy is this cup?" "50 grams." "100 grams." "125 grams." Everyone
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