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1·On the 20th of that month, Dr. Welch examined a sick boy, Billy, and knew he had diphtheria, a deadly infectious disease mainly affecting children.

在那个月的20号，韦尔奇博士检查了一个生病的男孩比利，得知他患了白喉，一种主要影响儿童的致命传染性疾病。

2·Diphtheria antitoxin is a foreign protein.

白喉抗毒素是异性蛋白。

3·Diphtheria is a serious infectious disease.

白喉是一种严重的传染病。

4·I ascertained the disease to be diphtheria.

我确定该病为白喉。

5·As diphtheria antitoxin is a foreign protein.

白喉抗毒素是并性蛋白。

6·Throat diphtheria approximately composes about 20%.

喉白喉约占20%左右。

7·Immune level; Diphtheria antibody; Hepatitis a antibody.

免疫水平；白喉抗体；甲肝抗体。

8·Even if they did, they probably dropped dead of diphtheria before age 24.

即使他们做了，他们也可能在24岁以前就死于白喉病。

9·German bacteriologist who was the first to culture the diphtheria bacterium.

德国细菌生物学家。他首次培养了白喉细菌。

10·Of course diphtheria still presents a threat and will probably always do so.

当然，白喉仍然并且可能长期是一种威胁。