The percentage of U.S. mothers whobreast-feedtheir babies has reached the highest level on record amid mounting evidence that it provides many health benefits to the child, U.S. officials said on Thursday.

• 据美国官员上周四介绍，美国妈妈母乳喂养的比例创空前纪录，目前已有大量证据表明母乳喂养对孩子的健康有很多好处。