其他三种动物的区别在于它们食用的低处枝叶和高处茎杆的比例不同：斑马吃茎杆最多，角马吃叶子最多，而转角牛羚则介于两者之间。
The other three species differ in the proportion of lower leaves and higher stems that they eat: zebras eat the most stem matter, wildebeests eat the most leaves, and topi are intermediate.
这种通过打谷子或谷类植物的茎壳以使各粒与茎管分开的作业曾一度是用牛或人的脚来做的。
This process of beating the stems and husks of grain or cereal plants to separate the grain or seeds from the straw was at one time done with the feet of oxen or human beings.
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