Lacking self-confidence and maturity, many teenagers are left feeling very vulnerable.许多十几岁的孩子既缺乏自信又不够懂事，所以感情上十分脆弱。Girls generally reach sexual maturity two years earlier than boys.通常女孩性发育成熟要比男孩早两年。Customers are told wha...
At maturity the root system is extensively nodulated.在成熟时,根系普遍具有根瘤.Humans experience a delayed maturity; we arrive at all stages of life later than other mammals.人类发育较缓——在生命的各个阶段，我们都晚于其他哺乳动物。Moreover, as time to maturity...
the transitory nature of his happiness他的幸福昙花一现In the final analysis, most of life's joys are transitory.归根结底, 尘世间的欢乐大多是过眼烟云,转瞬即逝.Most teenage romances are transitory.绝大多数青少年的恋情都转瞬即逝。...