The female is busy collecting grass, 这只母猪正忙着把草收集起来

211. And some of the smallest.
     和最小的食草类哺乳动物
212. Pygmy hogs are no bigger than rabbits.
     姬猪的大小和兔子不相上下
213. They're the tiniest and rarest of all wild pigs.
     这种猪是世界上最稀有的、体型最小的野猪
214. The female is busy collecting grass,
     这只母猪正忙着把草收集起来
215. but not for eating.
     不过这不是为了填饱肚子
216. She's building a nest.
     而是为了筑巢
217. Each piglet may be small enough to fit in the palm of a hand,
     每一只小猪都小得可以放在手掌心上

来自《行星地球 第一季 第七集 Planet Earth S01E07 伟大草原》第 214 行