云层围绕着图像边缘，而在中部，大西洋深蓝色的海水映出了这股波纹状，有点像棕黄色河流的火山灰。
Clouds bracket the edges of the scene, but the dark blue waters of the Atlantic Ocean show in the middle, and above them, a rippling, brownish-yellow river of ash.
边缘加劲，防止波纹。
当两个波纹膜片在边缘处粘结时，就构成一膜盒。
When two corrugated diaphragms are joined at the outer edges, the unit is referred to as a capsule .
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