But gills are not the only respiratory system aquatic insect can have.

不过鳃并不是水生昆虫唯一用来呼吸的器官。

Other aquatic insects like water treaders exploit surface tension, just like thumbtacks and paper clips.

其他水生昆虫，如水蟑螂，就像图钉和回形针一样利用表面张力。

To satisfy their appetite for aquatic insects and pond vegetation, foraging and diving appear to come naturally.

为了满足以水生昆虫和植物为食的需求，觅食和潜水看来是与生俱来的本领。

Many species of aquatic insects have flat extensions on the thorax and abdomen, when they're in their nymph phase.

当许多水生昆虫处于若虫阶段时，它们的胸部和腹部有扁平的延伸部分。

In the water-beetle, the structure of its legs, so well adapted for diving, allows it to compete with other aquatic insects, to hunt for its own prey, and to escape serving as prey to other animals.

其腿部结构非常适合潜水， 使其能够与其他水生昆虫竞争， 寻找自己的猎物， 并避免成为其他动物的猎物。