A proposal is sufficiently definite if it indicates the goods and expressly or implicitly fixes or makes provision for determining the quantity and the price.

一个建议如果写明货物并且明示或暗示地规定数量和价格或规定如何确定数量和价格，即为十分确定。

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Europeans, in particular, express sympathy for the argument that both serve the purpose of supplementing low wages, both are implicitly or expressly extortionate in nature and both are paid with the expectation of a quid pro quo.

FORBES: Tips and Bribes: Not the Same Thing