The curve is more than just an aesthetic feature - the arch forces the water to press downwards against the dam.

它的曲线不仅具有美学特征，它的拱门更是将水流压向水坝的下方。

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Gradually add more body weight over the foot, allowing the ball to press into your arch. Begin to slowly move your foot, allowing the ball to massage your heel, forefoot, and toes.

身体的重量会慢慢移到脚上，让球按摩你的足跟，脚前部和脚趾。

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Press down on the mat with your hands, gently increasing the arch in your back.

这时，双手紧压地面，轻轻向后弓背，增加弧度。

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Meanwhile, Mr Brown is these days in danger of becoming the champion of both the Labour left and the anti-European Tory press: a strange political base for the party's arch-moderniser.

ECONOMIST: Tony Blair and Gordon Brown can't go on like this

Cuomo concluded that some of Spitzer's closest aides, including Dopp, the governor's press chief, improperly conspired with the state police to dig up dirt on political arch-rival Joseph Bruno, the Republican majority leader of the New York Senate.

FORBES: Spitzer, Spin And Smear Tactics