Flat tube in any cross section are oblong, the length of the shaft according to the tube pitch to determine the size of.

扁管在任何一个截面均为长圆形，其长短轴根据管心距的大小来确定。

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Flat roofs may either be dead level or (preferably) have some degree of pitch to them so that rainwater and melted snow can drain away.

平屋顶可以为完全水平，也可以(这样更好)具有一定程度的坡度，以便雨水或融雪得以排除。

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Please ask the singer to pitch the song up a little, they sound rather flat.

请歌手把调子唱高一点，他们唱的调子太低了点。

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But spinners Malik (3-34) and Shahid Afridi (2-33) bowled tightly to limit the tourists to 243-7 on a flat pitch.

BBC: Jamshed impresses in Pakistan win

The Rose Bowl wicket had provided Lancashire problems on day one, but on an increasingly flat pitch, the visitors managed to move from a precarious position at the start of play to preserve their status as the only unbeaten team in the County Championship.

BBC: Lancashire bat out to draw with Hampshire

Cartwright made his Test debut in the fourth Test against Australia in 1964, taking 2 for 118 on a pancake flat Old Trafford pitch.

BBC: SPORT | Cricket | Ex-England seamer Cartwright dies