The Owl’s Wing

(Image source: https://i.kinja-img.com/gawker-media/)

 

猫头鹰在飞翔时几乎不会发出任何声音。这要归功于它的翅膀。

The wings of an owl enable it to fly in virtual silence.

猫头鹰翅膀前缘的羽毛结构成锯齿状,这能分散空气湍流,降低翅膀拍动时发出的声音。

The feathers on the leading edge are serrated, this helps to break up the flow of air, reducing noise.

猫头鹰翅膀上还有大量松软的羽毛,可以吸音降噪。

(Image source: https://www.researchgate.net)

 

Meanwhile the trailing edge of the wing has a flexible fringe, further dispersing airflow.

科学家仿照猫头鹰翅膀的构造,研发出一种涂层覆盖在风力发电机的叶片上。这不仅能大大提高转速和发电效率,也能有效地降低噪音。

Scientists are developing a coating mimicking this wing structure for use on wind turbines. That coating significantly increases blade speed and efficiency, while drastically reducing noise.

Source: https://www.jw.org/

圣经上说:

最初,上帝创造了天地。 - 创世记 1:1 In the beginning God created the heavens and the earth. - Genesis 1:1
我要赞颂你,因为我的受造奇妙可畏。你的作为奇妙,我是清楚知道的。 - 诗篇 139:14 I praise you because in an awe-inspiring way I am wonderfully made. - Psalm 139:14
自从创世以来,上帝那些看不见的特质,就是他的永恒力量和神性,都已清楚可见,从他所造的东西就能看出来... - 罗马书 1:20 For his invisible qualities are clearly seen from the world’s creation onward, because they are perceived by the things made, even his eternal power and Godship... - Romans 1:20
任何房屋都有人建造,但建造万物的就是上帝。- 希伯来书 3:4 Of course, every house is constructed by someone, but the one who constructed all things is God. - Hebrews 3:4