With such a long interval, it is difficult to determine the age of this fossil.
时间隔得这么久了，很难确定这化石的年代。
The age at death for early child mortality was determined by the mean interval between successive births and the mean age of neonates at registration.
幼儿死亡率的死亡年龄由母亲相继生育的平均时间间隔和婴儿出生登记时的平均年龄决定。
The interval between gestational diabetes and diagnosis of pancreatic cancer ranged from 14 to 35 years; median age at diagnosis of cancer was 58 (range 42 to 76).
从妊娠糖尿病到胰腺癌的诊断间隔时间从14年到35年，中间年龄为58岁(42岁到76岁)。
Methods The statistical description of fertility rate, age at first marriage, age at first birth, interval between marriage and first birth, birth interval.
方法应用描述性统计方法分析生育率、初婚初育年龄、婚育间隔、生育间隔和出生性别比及其变化趋势。
The age, stage, local site, pathological differentiation, the first treatment modality, radiotherapy and relapse time interval were not the influential factors to the availability of salvage surgery.
患者的年龄、病变分期、病变部位、鳞癌分化程度、首次治疗方式、放疗以及复发间隔时间等因素不影响原发灶复发后手术挽救的进行。
There was no close relationship between survival and other factors, such as age, extent of surgery, initial site, irradiation dose, or the interval between surgery and radiotherapy.
而年龄、手术切除范围、照射部位、剂量、手术与放疗间隔时间等与预后均无明显关系。
The dosage and interval of drugs change along with growth and development, so it is needed those age-dependent adjustments in infants and children.
儿童的用药量及用药间隔随年龄增长而有所变化，临床上儿童用药应当制订与年龄相适应的最佳方案，而不是简单的按体重或年龄给药。
Conclusions: There were susceptible age interval and topological sites for large intestine carcinoma. Most of them were adenomatous.
结论：大肠癌的发生具有明显的好发年龄及好发部位，且多数为腺癌。
Objective To explore the influence of age, gender and heart rate on QT interval in healthy primary and secondary school students.
目的探讨年龄、性别、心率对健康中小学生Q - T间期的影响。
Objective To explore the influence of age, gender and heart rate on QT interval in healthy primary and secondary school students.
目的探讨年龄、性别、心率对健康中小学生Q - T间期的影响。
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