They are noted for having segmented bodies, jointed legs, and stiff exoskeletons.

它们以分节的身体、有关节的腿和僵硬的外骨骼为主要特点。

The chest has two pairs of gauzy wings above, and underneath there are three pairs of jointed legs.

上面是两对轻薄的翅膀, 下面则是三对长有关节的腿。

With their jointed legs, they became the first invertebrates to venture onto dry land over 250 million years ago.

在两亿五千万年前，它们用分节的腿在无脊椎动物中最先登上陆地。

It has three pairs of jointed legs and two pairs of wings, all of which grow out of the middle part, or chest.

蝴蝶有三对分节的足，两对翅膀，都是从中间的部分“胸部”长出来的。

There are, however, some flying insects that walk on all fours that you may eat: those that have jointed legs for hopping on the ground.

只是有翅膀用四足爬行的物中，有足有腿，在地上蹦跳的，你们还可以吃。