To facilitate carrying, rope or metal handles are indispensable and should be fixed to the boxes.
为便于搬运,绳子或铁把手不可缺少,并将其固定在箱子上。
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。