The app is easy to read, with different colour bars representing different 'types' of sleep - feeding it with data such as your caffeine intake helps it to offer advice.
应用软件中的东西是很容易读懂的，不同颜色的色条代表了不同种类的睡眠，例如你输入你咖啡因的摄取量就能给你睡眠建议。
Breast-feeding isn't always easy; it takes some infants and mothers awhile to get the hang of it.
母乳喂养的确不那么容易，甚至需要母亲和婴儿花费一段时间才能熟悉。
But, feeding the large numbers of people spread over a large area was not easy.
然而，在很广的范围内解决众多人口的饮食问题并不是一件轻而易举的事情。
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