白波瀬指出，这一情况之所以产生，部分是因为她们无法找到前途足够良好的年轻男性以组建家庭。
Partly, Ms Shirahase says, that is because they cannot find young men with good enough prospects to start a family.
瀬尾的研究得到了美国莫尔顿体育用品生产商赞助，在研究中，他发现在低速下球的空气动力原理设计与流畅的圆球体更相似。
Seo’s research, which was supported by sports equipment manufacturer Molten USA, found that at slower speeds the ball’s aerodynamic behaviour begins to resemble more of a smooth sphere.
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