双下是四国军棋技术术语,指与盟国同时向敌人军旗进攻,一个去拔军旗,另一个去挖军旗旗角位。
那个年代的审美标准,双下颏,水桶腰。
The standard of beautiful woman in Tang Dynasty, the double chins and bucket waist.
双下模,180度回转,下模上顶加压,工作效率高。
Double lower shapes, 180 degrees turning, lower shape rise to press, and with high efficiency.
结论颏颈角切口颈阔肌成形术操作安全,对双下颏畸形的改善效果确切。
Conclusion Use of Platysmaplasty by cervico-mental Angle incision is a safe and effective method for double-chin deformity.
And most people are heterosexual There's a considerable amount that varies cross-culturally of people who are bisexual But the real puzzle is exclusive homosexuality ? So, why?
多数人都是异性恋的,而且不同文化背景下…,还有很多双性恋者,但真正的难题在于绝对同性恋,为什么呢?
If I took two double stranded DNA molecules and I exposed them to certain conditions that caused them to denature, that means its native structure falls apart.
假如我把两条DNA双链,放在特定的条件下,使它们变性,变性表示使它们的原始结构分开
That tells you something about the physical chemistry of the molecule; that it's these hydrogen bonds that hold the double strands and I can break those down under certain conditions.
我们从中可以知道一些,DNA分子的理化特点,双链是由氢键连接在一起,在一定条件下这些氢键可以断裂
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