此外，如果上衣是宽松式的，可以系腰带以凸显你的玲珑细腰！

Also, when the top has a loose fit add a belt to showcase your fabulous waistline!

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下承式系杆拱桥以系杆承受水平推力，属于无推力的组合体系拱结构。

A through tied-arch bridge is a type of built-up arch structure, characterized by the horizontal thrust of arch end being balanced by its ties.

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系留气球载雷达系统是以系留气球为搭载平台，以雷达为任务系统的一种综合信息系统，在军事和民用领域有着广阔的应用前景。

Tethered aerostat borne radar system is an integrated information system, in which the tethered aerostat is the carrying platform and the radar is the mission system.

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So this is our final equation, and this is actually called the Balmer series, which was named after Balmer, and this tells us the frequency of any of the lights where we start with an electron in some higher energy level and we drop down to an n final that's equal to 2.

把2代入到这里，所以得到1除以,这就是我们最终的方程，这叫做Balmer系，以Balmer名字命名的,它告诉我们从高能级掉到n等于2的,最终能级所发出光的频率。

麻省理工公开课 - 化学原理课程节选