Crickets hold their elytra up which creates a small air pocket that acts as a sounding box.

蟋蟀把鞘翘一个小气囊，到小共鸣腔的作用。

For the candidates, these two components are mounted on the elytra — the two most rigid wings on the insect.

对于演奏者这两部分都在它们的鞘上面——鞘虫的两个硬质的膀。

How differently constructed is the feathered wing of a bird and the membrane-covered wing of a bat; and still more so the four wings of a butterfly, the two wings of a fly, and the two wings with the elytra of a beetle.

鸟的羽毛膀和蝙蝠的膜覆盖的膀的构造有多么不同；更何况还有蝴蝶的四个膀、苍蝇的两个膀和甲虫的两个带有鞘的膀。