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我是个新手，很多名词和句子都不知道怎么翻译，还请高手指点。Seat Tube Range C-C
Your new bike's seat tube height should fall within this range. "Center-to-Center" signifies the length of the seat tube as measured from the center of the bottom bracket spindle to the midpoint of where the seat tube intersects the top tube. The seat tube height is most important as it relates to your head tube. If your seat tube is too short, your head tube will almost certainly be too short. This results in too low of a handlebar position placing an inordinate amount of stress on your neck and back. For this very reason, if you feel as though you could go with either of two sizes, going with the bigger frame is normally advisable. Please keep in mind that many frames come with a sloping or "compact" frame geometry in which the C-C seat tube measurement is artificially short. In the case of compact frames, you should primarily focus on the top tube measurement.
你的新自行车座管的高度应该在这一范围。C - C标志着该座管长度测量是从底部轴的中心到座管与上管相交的中点。这座管的高度是最重要的，因为它涉及到你的头管。如果你的座管很短，你的头管几乎肯定将太短。这样的结果是太低的把手位置导致对你的颈部和背部过多的压力。因为这个原因，如果你觉得你可以选择两个尺寸，选择更大的框架通常是可取的。请记住，许多倾斜或“紧凑”的框架是因为C - C座管人工测量偏短。在紧凑框架的案例中，你应主要集中在上管测量。
Seat Tube Range C-T
"Center-to-Top" signifies the length of the seat tube as measured from the center of the bottom bracket spindle to the top of the seat tube where it intersects the top tube.
C-T意味着座管的长度测量是从底部轴的中心到座管的顶端与上管相交的地方。
Top Tube Range
This measurement is along the top tube, from the midpoint at the seat tube to the midpoint at the head tube. No single piece of frame geometry has a greater impact on comfort than your top tube. If you plan on paying attention to one measurement and one measurement only, make it this one. Keep in mind that we do not measure the actual top tube on bikes with compact frame geometry. Rather, we use an "Effective Top Tube" measurement - an imaginary line drawn parallel to the ground along the length of the top tube.
这个测量是沿着上管，从座管的中点到头管的中点。在车架中没有任何一点比上管对舒适的影响更大。如果你打算只关注重一个测量，那就是它。记住，我们不测量在紧凑车架中的实际上管长度。相反，我们使用“有效上管”的测量-沿一个假想的平行地面的平行线的上管长度。
Stem Length
This measurement indicates your ideal stem length. It takes into account that your stem will be flipped to its flatter angle (e.g. 80° for Deda, 84° for Ritchey).
这个测量表明你的理想的杆的长度。它考虑到你的杆将翻转到平坦的角度（如Deda的80°，Ritchey的84°）。
BB-Saddle Position
This measurement is along the seat tube, from the center of the bottom bracket spindle to the top of the saddle. It is an ideal starting point for saddle height. Given the varying differences of cleat and pedal heights, and given the varying differences in the thickness of saddles, the BB-Saddle position has a broad range of 2cm.
这个测量是沿着座管，从底部轴的中心到鞍座顶端。这是车座高度一个理想的起点。鉴于脚蹬和踏板高度不同的差异，给予不同厚度的鞍座，bb-saddle位置有一个2公分的广泛范围。
Saddle-Handlebar
This measurement ties together your choice of stem length with your saddle setback. It is measured from the nose of the saddle to the near edge of your handlebar. Keeping within this range will assure that you don't accidently push the weight balance of your bike either too far forward or backward.
这个测量与你选择的鞍座杆的长度联系在一起。它是测量从鞍座前端到你的车把。保持在这个范围内将保证你的重心不是太前或太后。
Saddle Setback
This measurement is primarily a function of your femur length. The longer your femurs, the further your saddle needs to be behind the bottom bracket in order to allow you to produce power. If you sit too far forward (or too far back) you can over-emphasize certain muscles and joints, which robs you of power and can potentially cause you injury. Saddle setback is measured by dropping a plumb bob from the nose of your saddle and measuring how far behind the center of the bottom bracket it falls. This is not to be confused with the setback measurement of your frame, which is a measurement taken by dropping a plumb bob from the center of your seat tube/top tube interface, and measuring how far behind the center of the bottom bracket it falls.
这个测量主要是适合你的股骨长度的用途。股骨越长，越需要鞍座设置到底部支架的后面，使你便于发力。如果你坐得太前（或太后）会过分着重某些肌肉和关节，从而费力，甚至可能导致受伤。鞍座是测量从鞍座前端的下垂线和底部支架的中心下垂线的距离。这与你的座管/管接口的中心下垂线和底部支架的中心下垂线的距离的测量是不能混为一谈的。
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