sleep [sliːp]

【词频】★★★★★

v.睡；睡觉；供……住宿

n. 睡眠

【派】sleepy ['sliːpi] adj.困乏的；欲睡的

power ['paʊə(r)]

【词频】★★★★★

n.动力；政权；权力；强国

v. 为……提供动力

【派】powerful ['paʊəf(ə)l] adj.强大的

bird [bɜːd]

【词频】★★★★★

adj.鸟

【形】birth [bɜːθ] n.出生；血统；出身；起源

【例】n.出生

（2013江苏）A slave gave birth to her master's baby and, for fear that the child should be sold South, switched him for the master's baby by his wife.

【译】一个奴隶生下了主人的孩子，因为害怕孩子会被卖到南方，就把他的孩子与主人夫妇的孩子调了包。

【词组】give birth to：生孩子；引起

birthday ['bɜːθdeɪ] n.生日；诞辰；诞生的日子

birthplace ['bɜːθpleɪs] n.出生地；发源地

energy ['enədʒi]

【词频】★★★★★

n.能量；精力；活力；精神

【派】energetic [ˌenə'dʒetɪk] adj.精力充沛的；积极的；有力的

【例】adj.精力充沛的

（2012湖北）Imaginative ideas are most likely to come to us when we're unfocused.If you are one of those energetic morning people, your most inventive time comes in the early evening when you are relaxed.

【译】我们在注意力不集中时最有可能产生富有想象力的想法。如果你是那种早上精力充沛的人，那么你最富有创造力的时间段会在黄昏放松时。