The changing law of the length of the sun's shadow at noon throughout the year is "from summer to winter, it gradually becomes longer; from winter to summer, it gradually becomes shorter."
The variation law of the length of the solar shadow at noon throughout the year is "from summer to winter, gradually longer; from winter to summer, gradually shorter."
The changing rule of the length of the sun's shadow at noon all year round is "from summer to winter, it gets longer gradually; From winter to summer, it gets shorter. "