1. Their humbler followers, such as partridges, have a like power of strong propulsion, but soon tire.
    它们的低级同类, 如鹧鸪, 有一种同样大的推进力, 但很快就疲劳了.

2. Their humbler followers, such as partridges, have a like power of strong propulsion, but soon tire.
    它们的低级同类, 如鹧鸪, 有一种同样大的推进力, 但很快就疲劳了.

3. Their humbler followers, such as partridges, have a like power of strong propulsion, but soon tire.
    次于野鸭和鸽子的鸟，如鹧鸪，有相似的巨大推动力，但很快会疲劳。