千夫
a lot of people (literary)
潜伏
to hide; to cover up; to conceal
前俯后仰
to rock one's body backward and forward; to be convulsed (with laughter etc)
前赴后继
to advance dauntlessly in wave upon wave (idiom)
潜伏期
incubation period (of disease)
横眉冷对千夫指
to face a thousand pointing fingers with a cool scowl (citation from Lu Xun); to treat with disdain; to defy