leg up

n.

（对上马或跨跃障碍时的）帮助；

Leg up
Leg up strap
Social Science Gets a Leg Up at NSF
Shared Services: A Leg Up on Acquisition Payoffs
Pricing Internal Trade to Get a Leg up on External Rivals
Breast-Fed Babies May Have a Leg Up in the Battle Against Childhood Obesity
External Support to Schools on Probation: Getting a Leg Up?.
Getting a leg up: Mammalian postcrania across the Cretaceous-Paleogene boundary in northeastern Montana
Textures and traction: how tube-dwelling polychaetes get a leg up.
3. External support to schools on probation: Getting a leg up? (2003)