If an engine ingests a bird, it must be able to shut down safely without bursting into flames or exploding.
如果发动机吸入一只鸟，它必须能够安全关闭，不发生突然起火或爆炸。
Hav is usually spread from person to person when an uninfected person ingests food or beverages that have been contaminated with the stool of a person with the virus.
甲型肝炎通常是人与人之间传播，即未受感染者食用了由病毒携带者的粪便污染过的食物或饮料。
The average person ingests a very safe amount, 2 to 3 milligrams, daily through fluoridated drinking water, toothpaste and food.
人每天通过水、牙膏、食物摄入氟化物的安全剂量是2- 3毫克。
The average person ingests a very safe amount, 2 to 3 milligrams, daily through fluoridated drinking water, toothpaste and food.
人每天通过水、牙膏、食物摄入氟化物的安全剂量是2- 3毫克。
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