In addition to parabolic troughs and power-towers there is also a third solar-thermal technology, which combines curved, dish-shaped mirrors with heat engines.
除了凹面镜，能量塔以外，还有第三种新的太阳能热技术。结合了曲线，盘状镜面和热发动机的装置。
2
Unique art objects are placed on the pyramids, inspired by parabolic sound mirrors, exploring the meaning of sound in this soundscape.
这些独特的艺术作品，像是受到声反射镜连续反射，在这个声音景观中不断的向前，去探索声音的意义。
3
The bending methods for elliptic and parabolic figure with variable-width mirror were discussed and the formula of variable-width for ladder-shaped mirrors was given.