As an expert in the field of sports and particularly in soccer, I can provide you with an accurate explanation of the term "Designated Player" (DP) in Major League Soccer (MLS).

In MLS, a Designated Player is a mechanism that allows teams to sign star players who are not part of the league's salary cap budget. This means that a team can pay a higher salary for a player who is expected to bring a significant level of skill and recognition to the team, which can help boost the team's profile and performance. The league has specific rules regarding the DP slot, including a budget charge that counts against the team's salary cap. As of my knowledge cutoff in 2021, each team is allowed a certain number of DPs, and there are also limits on the maximum budget charge for each DP.

Here's the translation in Chinese:

在美国职业足球大联盟（MLS）中，指定球员（DP）是一种机制，允许球队签下不属于联盟薪资帽预算的明星球员。这意味着球队可以为预期将为球队带来显著技能和认可度的球员支付更高的薪水，这有助于提升球队的知名度和表现。联盟对DP名额有具体的规定，包括计入球队薪资帽的预算费用。截至我2021年的知识截止日期，每个球队都允许有一定数量的DP，并且对每个DP的最大预算费用也有限制。

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The 2010 changes: The rule has no expiration date. For each Designated Player, $335,000 of his salary is charged to the salary cap and paid by the league ($167,500 for DP players joining during the MLS summer transfer window), with any remaining salary being paid by the team's owner.read more >>