因此，在这篇文章中，我准备探讨两个问题，即清道夫体系是否过时，以及它是否适合美国高年级中学中所开展的足球运动②。
Therefore, in this article I would like to explore the question of whether the sweeper back system is an outdated mode of play and how appropriate it is or is not for high school soccer.
因此，在这篇文章中，我准备探讨两个问题，即清道夫体系是否过时，以及它是否适合美国高年级中学中所开展的足球运动②。
Therefore, in this article I would like to explore the question of whether the sweeper back system is an outdated mode of play and how appropriate it is or is not for high school soccer.
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