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- The boy's voice is beginning to crack at the age of puberty. 这男孩子的嗓音在发育期开始变得粗声粗气。
- "In the wild, subtle outcomes such as length of gestation, litter size and the age of onset of puberty are difficult to ascertain," says Janssen. “在野外，如怀孕期，胎仔数和青春期年龄等精细结果很难确定。”Janssen说。
- The attainment or onset of puberty. 到达青春期或青春期开始
- He reached puberty at the age of fourteen. 他14 岁时进入了青春期。
- The period between childhood and the onset of puberty,often designated as between the ages of 10 and 12 in girls and 11 and 13 in boys. 青春前期从儿童到青春期开始这段时间，年龄上女孩通常认为是从10岁到12岁，而男孩则通常从11岁到13岁。
- Puberty, reach the age of puberty 青春期,婚姻适龄期,成熟
- young people at the critical age of puberty 处于青春临界点的少男少女
- The average age of the boys in this class is fifteen. 本班男生的平均年龄是十五岁。
- I don't think he looks his age of seventy. 我感到他看起来不像70岁的人。
- The age of majority is eighteen. 成年的法定年龄是18岁。
- He ran away from home at the age of thirteen. 他十三岁那年就离家出走了。
- At the age of thirty, Mary began to lose colour. 玛丽在30岁的年纪就红颜渐逝了。
- She was orphaned at the age of ten. 她在十岁时成为孤儿。
- My father retired at the age of 60. 我父亲六十岁时退休了。
- My grandmother got married at the age of seventeen. 我的祖母十七岁就结婚了。
- He was already balding at the age of 25. 他25岁就秃顶了。
- Cole popped off at the age of twenty. 科尔在二十岁时突然死去。
- He lived to be [to the age of]80. 他一直活到了80岁。
- The average age of the students is 19. 学生的平均年龄是19岁。
- He was composing at the piano at the age of seven. 他7岁时就会钢琴作曲。
