1、The megaripples on the desert sand were evidence of the powerful windstorm that had passed through.（在沙漠沙地上出现的巨大涟漪是强风暴过后的证据。）
2、The megaripple carved into the mountain by the ancient glacier was a testament to the immense power of nature.（古代冰川在山上刻下的巨大浪沟证明了大自然的巨大力量。）