VOA慢速英语:Two Studies Give a Lift to Running Barefoot

land on落到…上; (使)在…上登陆

例句：A drop of rain landed on my head.
      一滴雨滴落在我头上。

      We never imagined that men would land on the moon.
      我们从未想到过人类能登上月球。

(跌倒时)某部位着地

例句：He fell headlong and landed on his face.
      他脸朝下一头栽到地上。
 
2.The study appeared in the official scientific journal of the American Academy of Physical Medicine.

appeared出现在某杂志上，相当于was published

3.He says the way most running shoes are designed may explain why those who wear them land on their heels.

这句话的主语和谓语是He says，后面是宾语从句，宾语从句的主干是：the way may explain why those land on their heels.most running shoes are designed是定语从句，修饰the way。who wear them也是定语从句，修饰those。