Cylindrical and spherical shapes are typically the most convenient choices-simple containers like coffee or paint cans are often used.
圆柱形和球形是最方便的选择——常常可以使用诸如咖啡罐或油漆罐等。
Cylindrical and spherical shapes are typically the most convenient choices-simple containers like coffee or paint cans are often used.
圆柱形和球形是最方便的选择——常常可以使用诸如咖啡罐或油漆罐等。
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