蜻蜓的單詞怎麼寫

例句：

Was it really the tooth of the dragonfly?

那真的是蜻蜓的'牙齒？

Where does a dragonfly spend most of its life?

蜻蜓的一生大部分在哪裏度過？

When I looked back, the huge dragonfly was still there.

我回頭看的時候，那隻巨大的蜻蜓還在。

They caught a dragonfly and watched its wings carefully.

他們抓了一隻蜻蜓，並仔細觀察它的翅膀。