In this background, trust is thought as a key variable for successful exchange relationships.

在这个背景下，信任被认为是建立成功交换关系的关键要素。

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One key variable is how stiff or flexible the nib is to be.

笔尖的软硬是非常重要的一个参数。

youdao

One key variable is how stiff or flexible the nib is to be.

笔尖的软硬是非常重要的一个参数。

youdao