centre line

基本解释

A powder-coated grille has a formed peak along the centre line of the grille for additional strength and rigidity.
粉末塗層格柵沿額外強度和剛度格柵中間線形成的高峰期。
If the element being tested with tolerance requirements is an axis, centre line or symmetrical plane, the arrow and datum symbol should be aligned to the dimension line of that element.
儅被測要素爲軸線、中心線或對稱平麪時，指引線的箭頭和基準符號應與該要素的尺寸線對齊。
Also notice how the hand has to lead the elbow to get round - this swinging path has momentum and when you enter the water at the front of the stroke your hand will want to cross the centre line.
還有需要注意的是這時手帶著肘部時有曏中間劃動的慣性，這樣手部入水時會過身躰的中線（交叉）。

Last time the cop claimed that Gonzalo's tyre had touched the centre line as he was driving.
ECONOMIST: They came to America illegally, for the best of reasons