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Keywords age of vaccination;MSIS epidemic model;threshold;balance point;stability; 接种疫苗年龄;MSIS流行病模型;阈值;平衡点;稳定性;
I'm immune to smallpox as a result of vaccination. 我接种过疫苗了,所以对天花有免疫力。
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。
The age of the cat and type of vaccine may influence the number of vaccinations required. Follow your veterinarian's recommendations. * 猫只的年龄及疫苗的种类可能影响所需注射的次数，请遵照兽医指示。
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。
Certificate of vaccination or revaccination against smallpox. 国际接种证书。
He was composing at the piano at the age of seven. 他7岁时就会钢琴作曲。
An age of ideological confrontation. 一个意识形态对抗的年代
He learned to multiply at the age of five. 他五岁学会做乘法。
He attained the age of 25 before marrying. 他年届廿五始完婚。