蚕爬到桑叶上的英文翻译是："the silkworm crawls on the mulberry leaves."

来源：桑叶是蚕食的主要食物，蚕爬行是其生活习性之一。

例句：

The silkworm crawls on the mulberry leaves to eat and spin its cocoon.

蚕在桑叶上爬行，以便食用并编织茧。

The farmer tends to the silkworms carefully, making sure they have plenty of fresh mulberry leaves to eat.

农民谨慎地照料蚕，确保它们有足够新鲜的桑叶食用。