Despite their current success, 尽管它们如今非常成功

149. Today, for every human on the planet,
     今天地球上的昆虫
150. there are more than a billion insects.
     超过人类数量的10亿倍
151. They are the most abundant group of animals on Earth.
     它们是地球上数量最多的动物
152. Despite their current success,
     尽管它们如今非常成功
153. the ultimate flying insects first appeared back in the ancient swamps.
     最终能够飞行的昆虫 最早出现在古代沼泽中
154. Dragonflies.
     蜻蜓
155. Their flight is as close to perfect as it gets.
     它们的飞行几乎堪称完美

来自《我们星球上的生命 第一季 第三集 Life on Our Planet S01E03 入侵大地》第 152 行