颈线

牙冠与牙根交界处呈一弧形曲线，称为牙颈，又名颈缘或颈线。

Tooth coronal and tooth root boundary show one arc curve , call tooth neck , renown neck predestined relationship or neck line .

所以颈线位是下单的最佳位置。

And therefore the neckline is the best position to place your transactions .

圆底及下垂的颈线则是较为少见的情形。

And down the neckline is a very rare situation .

跌幅：从头到颈线的垂直距离为最小跌幅。

Dropdown : the minimal dropdown is the vertical distance which is from the head to the neckline .

不对称的泳装有助于把大家的目光吸引到颈线上，而撞色系列的泳衣则有利于凸显你的曲线。

Asymmetrical suits are perfect for drawing attention to the neckline , whilst colour blocking can help highlight your shape .

轴颈线速度、密封腔压强、端面摩擦因数对于泄漏量、静态刚度具有很大影响，为特殊工况下径向密封件的设计和选用提供了参考。

It provides an important reference example for the design and pattern selection of a radial sealing in special working condition .

摸起来如丝绸一般柔软，加上爱心轮廓的颈线，完美的衬托出脖颈和前胸的线条，当你缓步前行，纱裙仿佛轻如空气，在你周围优雅的旋转。

Silky to the touch , the bustier has a flattering sweetheart neckline , while the skirt feels as light as air , twirling gracefully as you walk .

红色的瓶颈线表示资源为最大容量时的情况（本例为数据库），无法再增加大小。

The red bottleneck line shows what happens when you have a resource that is at full capacity ( in this example , the database ) and cannot be increased in size .