How did she make this ring? Today we answer this question as we explore the history and methods of jewelry design.
她是如何制作的？今天，我们回答这个问题，顺道探索下珠宝设计的历史及方法。
The packing methods and the question categories use within-subject design, and, the situation categories and the subjects categories use between-subject design.
拆包方式和问题类别采用组内设计，情境类别和被试类别采用组间设计。
The packing methods and the question categories use within-subject design, and, the situation categories and the subjects categories use between-subject design.
拆包方式和问题类别采用组内设计，情境类别和被试类别采用组间设计。
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