Plan, plan, plan and plan again. Decide in advance, for instance, which products each additional item can be related to.

计划、计划、计划、还是计划。预先决定，例如，附加商品可以与哪款产品联系起来。

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Alternatively, if the seller has set a minimum sale price in advance (the 'reserve' price) and the final bid does not reach that price the item remains unsold.

或者，如果卖家已经提前设定了最低售价(“保留价”)，而最终的竞价没有达到这个价格，拍卖品则不出售。

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Decide in advance, for instance, which products each additional item can be related to.

预先决定，例如，附加商品可以与哪款产品联系起来。

youdao

He goes on to describe how they would tweak gameplay to maximize revenue before fun, making item drops more infrequent to frustrate players into spending a couple of bucks to advance their game.

FORBES: Former Zynga Engineer Trashes His Old Company