An annual influenza vaccination is the most effective way to avoid this potentially dangerous illness.

年度流感疫苗是预防这种危险疾病最有效的办法。

She knocked at the door, and when it was opened, asked for a certain kind of tablet often used in dangerous illness.

她敲了敲门，门一打开，就要了一种常用于险症的药片。

While She was big with Agnes, your Mother was seized by a dangerous illness, and given over by her Physicians.

当她和艾格尼丝一起长大时，你的母亲患上了一种危险的疾病，并被她的医生放弃了。

Assuming we can surmount the physical challenges of undersea habitation—like breathable air, high pressure, and dangerous illnesses—what would an ocean-based, human colony look like?

假设我们能克服海底居住所面临的物理挑战——比如可呼吸的空气、高压和危险的疾病，那么基于海洋的建造人类栖息地会是什么样子的呢？