不过老实说，我认为一旦越过困难的学习门槛，JRuby的生产效率是最高的。
I honestly think that, once the curve is passed, JRuby could offer the most productivity.
马车之后的额外的马加入一小组马的一匹马，帮助四轮运货马车通过深水或越过困难地形。
A horse added to a team of horses to assist a wagon through high water or over difficult terrain.
他们上下楼梯也有困难，下楼时，用脚先下楼。但是，研究者们也报道说看到过他们“奔跑”，灵活地越过不平的地形，奔跑很长一段距离。
They also have difficulty with stairs and descend feet-first. However, researchers also report seeing quadrupeds' running ', moving agilely over rough terrain and travelling long distances.
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