• a certain disease
  • ある病気;((遠回しに))性病
  • a certain Mr. Brown
  • ((形式))ブラウンさんという人
  • a lady of a certain age
  • ある年齢の女性;((遠回しに))年配の女性(◆50から60歳ぐらい)
  • at a certain time
  • 一定の時刻に
  • certain death
  • 避けられない死
  • for a certain time
  • しばらくの間
  • I am not certain about that.
  • それについてはよく知らない
  • I am not certain whether he was there or not.
  • 彼がそこにいたかどうか確信がない(◆whetherの代わりにthatとするのは不可)
  • in a certain condition
  • ある状態に;妊娠して
  • A genetic predisposition to keratoconus has been observed, with the disease running in certain families, and incidences reported of concordance in identical twins.
  • Wikipedia: Keratoconus
  • As conferences became contractually bound to certain bowl games (a situation known as a tie-in), match-ups that guaranteed a consensus national champion became increasingly rare.
  • Wikipedia: History of American football
  • At a certain rate of rotation, the beam passes through one gap on the way out and another on the way back, but at slightly higher or lower rates, the beam strikes a tooth and does not pass through the wheel.
  • Wikipedia: Speed of light
  • At best, cooking times could be specified as the time it took to say a certain number of prayers or how long it took to walk around a certain field.
  • Wikipedia: Medieval cuisine