Brilliant shafts radiated from the convexity of the arch, coming and going silently.

光柱从拱门的处放射出来， 无声无息地来。

There are terms like convexity and duration and there are mathematical symbols, but people don't really use those very much on a day-to-day basis.

其中有度、持续时间等术语以及数学符号，但人们在日常生活中并不经常使它们。

He regarded the delicate lines of her profile, and the small, tight, applelike convexities of her bodice, so different from Arabella's amplitudes.

他注视着她轮廓的精致线条，以及她紧身胸衣小巧、紧实、苹果般的，阿拉贝拉的振幅截然不同。

If Alice is pressed and she needs to justify  why exactly this is true, which is important for understanding how the problem might  generalize, she can appeal to the idea of convexity.

如果爱丽丝受到压力， 并且她需要证明为什么这是真的，这对于理解问题如何概括很重要，她可以诉诸性的想法。